Skip to main content

Home/ EDTECH at Boise State University/ Group items tagged Information

Rss Feed Group items tagged

1More

When Technology Does Not Support Learning: Conflicts Between Epistemological Beliefs an... - 1 views

  •  
    This article takes the provocative position that a PLN is *not* the best learning situation for all learners. The authors qualify this, however, explaining "when the technology used to support learning is designed to support a specific learning model, this can often lead to a compulsory learning process that users must follow to reach the course objectives." I am not entirely sure this is a bad thing, however; in formal learning situations, I think it makes sense to have clear objectives, assessments, and learning activities. In informal settings--such as personalized professional development for practicing educators, for example--this point might hold true. The authors explain that individuals' epistemological beliefs affect their willingness to learn in an informal (PLN-based) learning situation. Further, the authors believe that beliefs about the role of technology for learning will impact the learning that can occur in a PLN. I really agree with these ideas!
7More

Website #10- Connectivism - 8 views

  •  
    This is a pretty simple explanation of connectivism. Basically it is about adding nodes to your PLN which connects you to another resource.
  • ...4 more comments...
  •  
    I appreciate the simple explanation this article provides. "Connectivism is driven by the understanding that decisions are based on rapidly altering foundations. New information is continually being acquired." This aspect help solidify the idea that knowledge is not finite and gaining it is never over. Connectivism provides a way to help make sense of our knowledge potential in light of constant change in technology.
  •  
    This is a great resource for Connectivism. I felt that this theory was more dense then PLNs and CoPs and many articles I looked at were difficult to follow. I like how the theory is broken down here and includes helpful videos. I will be using this resource to help with my creative expression project.
  •  
    Thank you for sharing! I also found the simplicity of the explanation great in order to grasp the concept. By referring to Connectivism as to "a learning theory for a digital age" makes it easy to remember that it is a new theory (since the digital era is also relatively new.) That, in turn, may also affect the way we perceive the main principles of Connectivism (outline in the article): learning as a process of connecting specialized nodes or information sources, learning residing in non-human appliances, and the need to maintain connections to facilitate continual learning, among others. Due to such an abundance of information in the digital era, the key point in the article for me was "the ability to draw distinctions between important and unimportant information is vital"! A skill is yet to be mastered!
  •  
    While not really dealing with the theory, I thought the video demonstrating how Connectivism works was really well done. It was interesting to see the path a student might follow and how their web expands.
  •  
    Usually when I see anything WIki that has to do with research I have the initial tendency to try to stay far away because in my undergrad years I was constantly reminded to pursue peer reviewed articles. What I really appreciate about this resource is how simple and basic it is on Connectivism. This wikispace provides all the "nuts and bolts" of Connectivism and is a great starting point for digging deeper into understanding its theory. Great find!
  •  
    "Connectivism is a learning theory promoted by Stephen Downes and George Siemens." Learning occurs with connections in networks. This article believes that with connectivism we can move to a new age of learning. Learning can be more collaborative and global. With connectivism we see the use of networks with nodes and connections to elaborate on our learning.
8More

The End of Isolation - 11 views

  •  
    The study in the paper was interesting as it looked at K-12 educators and their use of Twitter to research, relate and form PLNs. Twitter and other social medias have allowed teachers to form networks that are specific to their needs and wants in terms of their own professional growth. In the "End of Isolation" the researchers findings touched on the fact that "over 82% of the time, the educators in this study chose to follow other educators or content experts related to their field of teaching so they were able to create a personal learning network meaningful to their professional needs." Now I just need to work with teachers at my school site to help them realize the individualized professional potential!
  • ...5 more comments...
  •  
    Cassie- This is a really neat resource in which actual data has been accumulated and presented for teachers and their use of a social networking website. It was interesting to look at the numbers behind the ten educators that they chose and see them present some other general findings. I think the "Benefits" section towards the end of the article hits the goals of any social network precisely: 1) Access to Resources, 2)Supportive Relationships, 3)Increased Leadership Capacity, and 4)Development of a Professional Vision. IF you get into these tools to become a better educator, then I feel those are four visions that you set out to fill by utilizing the networking/technology.
  •  
    This is a great resource to use to support the research behind using Twitter as an educator. I think the title of the article says it all. As the only social studies on my campus, I have learned to reach out to other teachers using social media. The end of the article brings up some interesting points regarding professional development and Twitter. Research says that teachers need more than just a "one stop shop" when it comes to any professional development, and that they need time to reflect, question, and practice. I would argue that Twitter allows for exactly that. Having a community of teachers to come back to in order to reflect on a teaching experience and/or ask for support provides a safe place to do just that.
  •  
    Cassie, this was a very interesting research article that presented actual statistics and information on how teachers utilize social media, specifically Twitter. It was very informative and discussed the uses of twitter beyond just being a social outlet.
  •  
    This was indeed an interesting research project. It was nice to see that there were so many collaborations that were spawned through Twitter connections. Most of the teachers said they were able to exchange information or resources at a professional level, but I was surprised by how many continued the conversation at a social level also.
  •  
    I feel like this resource has a lot of valuable information. I am very interested in learning to use Twitter as a form of PLN using Twitter and this resource seems to show the value in that. In addition, I liked the research study approach to this article.
  •  
    This study underscored the benefits of Twitter for the educational community. The article shared the advantages to new teachers in particular, where one participant stated it changed her vision and practice in the classroom. Very powerful!
  •  
    Of all the resources I have read thus far on PLNs, this particular article forced me to think deeper and reconsider my interpretation of this concept. First of all, I found that the article provided a picture of the quality of interaction that can occur within Twitter. The data collected by researchers provides an in depth look at Twitter as a PLN - a feat that few other resources I have read have accomplished. By detailing the amount, quality, and type of interactions and connections, a tangible conception of a PLN emerges, even for someone who has little to no experience with Twitter. Of the 10 surveyed, a majority of their connections and tweets were professionally related. According to Nussbaum-Beach (video I posted), the difference between a PLN and a CoP is the familiarity of the people and the connection to an idea or problem. However, this study provides a different perception of a PLN that is largely professionally based with strong two-way connections. These conclusions made me wonder if it is possible for facets of a PLN on Twitter to transform into a CoP. Further, at what point can one argue that a PLN has successfully transform into a virtual CoP? Thanks for sharing. This was an excellent read!
6More

Educators Are Ditching Traditional Conferences for Blogs and Twitter - InformED - 9 views

  •  
    This post explains how educators are becoming more sophisticated in their social media use which is leading to more shared information outside of the traditional conference or classroom.
  • ...3 more comments...
  •  
    This is a fascinating article! I was really inspired by at as I'm finding myself becoming more interested in making sure my social media connections are there to provide professional development (while mixing in some personal). As we become more tech centered, I can see there being value in collaborating online and learning through a variety of avenues, rather than sitting in a common area. I think this article can also be emphasized for student learning as we encourage them to learn and find connections to the content outside of the classroom.
  •  
    This was an awesome article about professional use of social media. I think that it is really interesting to talk about how fewer teachers are attending face to face conferences and are instead replacing those with the use of the internet and social media!
  •  
    Interestingly, I've found that in my field, Twitter has become a way to supplement the conference experience. Those who can't afford to attend are encouraged to follow along with what's happening (live) using session-specific hashtags. I can see librarian conferences eventually going by the wayside, and I'm not certain that I would be upset about that!
  •  
    This was an interesting read. I also find that many conferences are hard to attend due to funding. I like how many educational professionals are finding ways to connect using their PLNs through Twitter to participate in edchats. Social media has made the ability to connect with others in your field so much easier and cheaper. It also demonstrates the point how learning and professional development are becoming more self-directed to meet each educator's needs. Thanks for sharing!
  •  
    At my district professional development day this August, there was a session title Twitter for Teachers. While my district is not prepared to get rid of traditional PD, they can see the value in PLNs that allow for continuous professional growth. I think this article provides a great explanation of the transition from traditional PD and conferences to a digital world. The author also notes, however, that personalized learning could lead to "one-sided" information. I think that is why it may be important for districts to educate their teachers on PLNs to hopefully start them in the right direction.
8More

Connectivism: a network theory for teaching and learning in a connected world - 11 views

  •  
    Breakdown of the theory of Connectivism, distinctions between groups and networks and learning about the history & application of Connectivism in education
  • ...5 more comments...
  •  
    This article is packed with concise information about connectivism. The eight bulleted points about connectivism really did a great job of summarizing the main points that Siemens makes about learning in a digital age. This was a great find. The embedded multimedia added to this site giving a great overview of this learning theory.
  •  
    I think this article provided a succinct description about what connectivism is and the two main proponents of this theory, Stephen Downes and George Siemens. The background information and basic principles are helpful in further understanding the concept of connectivism, and there are many additional resources providing within the article to help the reader learn more, as well.
  •  
    A valuable synthesis and outline of connectivism. I agree, the detailed summation is easily understood and simplified for practical application.
  •  
    What I really liked about this article is the idea that teachers who use connectivist principles for their own learning can model that behavior for students to do the same.
  •  
    a. In this short article, Bell provides an overview of connectivism as a theory for the new era of education. Statistics of increases of internet access in homes and us in higher education set the stage to making connectivism a legitimate player in education today. Bell then breaks down connectivism as a theory and identifies it as the successor to classic educational theories such as behaviorism, cognitivism, and constructivism. The article ends with some suggestions for educators looking to apply this theory.
  •  
    This article talks about the importance of networks and the difference between a group emphasis and a network emphasis. The author discusses the importance of information running through a network of human and non-humans. He additionally outlines Siemen's principles of Connectivism. Further, he discusses the implications for using the principles of Connectivism by educators and within higher education.
  •  
    Kelsey, thanks for sharing. I found the article relevant to my own practice as a higher ed librarian, where we are increasingly encouraging students to be producers of information and to participate in the scholarly conversation.
1More

Censorship in the classroom: Understanding controversial issues - 0 views

  •  
    "Censorship in the classroom: Understanding controversial issues\n\nhttp://www.readwritethink.org/lessons/lesson_view.asp?id=203\n\nA lesson plan for grades 9-12 English Language Arts and Information Skills\nLearn more\n\n * Learn more about banned books, biases, censorship, language arts, media, persuasive writing, propaganda, reading, stereotypes, and writing.\n\nHelp\n\nPlease read our disclaimer for lesson plans.\nLegal\n\nPrint\n\n * Print\n\nShare\n\n * Email\n * Delicious Delicious\n * Digg Digg\n * Facebook Facebook\n * StumbleUpon StumbleUpon\n\nIt is important for young people to understand their individual rights and what they, as citizens, can do to protect these rights. In addition, young people need to understand the way in which bias and stereotyping are used by the media to influence popular opinion. In this ReadWriteThink lesson, students examine propaganda and media bias and explore a variety of banned and challenged books, researching the reasons these books have been censored. Following this research, students choose a side of the censorship issue and support their position through the development of an advertising campaign.\nNorth Carolina Curriculum Alignment\nEnglish Language Arts (2004)\nGrade 9\n\n * Goal 3: The learner will examine argumentation and develop informed opinions.\n o Objective 3.01: Study argument by:\n + examining relevant reasons and evidence.\n + noting the progression of ideas that substantiate the proposal.\n + analyzing style, tone, and use of language for a particular effect.\n + identifying and analyzing personal, social, historical, or cultural influences contexts, or biases.\n + identifying and analyzing rhetorical strategies that support proposals.\n\nGrade 10\n\n * Goal 3: The learner will defend argumentative positions on literary or nonliterary issues.\n o Objective 3.01: Examine controversial is
1More

Where are you going to college? - 0 views

  •  
    This site provides information and resources to help students make an informed decision on which college to attend.
1More

KidsHealth - 0 views

  •  
    This site has a lot of free information. If you click on teens, it has great information on plagiarism.
3More

Mimi Ito on Collected Learning, Children and Digital Media - 1 views

  •  
    Mimi Ito discusses how children are using digital media and the learning that goes on as they hang around and geek out - informal learning. She explores the role education can play in this and the role of the adult and how to support their engagement. She discusses the difference between friendship driven activities online and interest driven activities and the opportunities for learning in those spaces (personal networks). It looks at ways that these could be linked to school-based activities.
  •  
    I like the comments made near the start of the video that the digital media and communication in which children are engaging is no different from the personal networks that have been formed in generations past. It serves the same purpose in their development, socially and academically.
  •  
    Some of my take aways from this video are: "social relations are important for learning." "The mediated environment isn't so different from when we were trying to get our daughter off the phone or our son to come in." "How can we be more active in connecting the informal learning with learning." Let "Sts reflect and not just consume." Ideas are along the same lines as others in this field. As an educator I want to have students participating in student centered learning, but come up against road blocks admin and district don't understand.
1More

Hanging Out, Messing Around, and Geeking Out | The MIT Press - 0 views

  •  
    Here is the book that fully explores how children learn in social, informal settings. It is the result of a three year study and is available as a free download here. (see my earlier bookmarked interview with Mimi Ito.) It explores many examples of informal personal learning networks in which children participate.
2More

Common Sense Media - 0 views

  •  
    This is a fantastic resource for students, educators and parents. This website hosts curriculum for online learning and social networking information that can be used in classrooms and in homes. According to it's site summary: Common Sense Media improves the lives of kids and families by providing independent reviews, age ratings, & other information about all types of media.
  •  
    Took me a little bit of digging, but I can see the benefit of this website. My school just went to 1:1 iPads and I can see the benefit in sites like this.
18More

How Do I Get a PLN? | Edutopia - 1 views

  • Personalized Learning Network -- the shift in nuance maintains that participants are both personal and professional learners.
  • A PLN is a tool that uses social media and technology to collect, communicate, collaborate and create with connected colleagues anywhere at any time.
  • PLNs accept people for their ideas, not their titles.
  • ...8 more annotations...
  • These PLN activities stimulate, for many, the need to express themselves further in blogging, speaking and writing books
  • The PLN is a mindset, not the outcome of a workshop or the PD offered annually by many school districts. It is not a one-shot fix.
  • Successful users of PLNs overwhelm the uninitiated with techno-babble.
  • t requires, at least at first, digital literacy beyond a Google search.
  • continuous building and active use of PLNs as a tool for learning benefit educators personally and professionally in ways never before possible.
  • PLNs Are Collaboration
  • technology is collaboration on steroids, supporting "connected educators"
  • Technology has fundamentally changed collaboration by removing barriers of time and space.
  •  
    A PLN or Professional/Personal Learning Network is a tool that uses digital information like social networks to collect, communicate, collaborate, and create with similarly minded people all over the world at any time. PLNs aren't being widely used because of the challenge to navigate the resources. PLN's do drive collaboration and technology is the tool that fuels it. They are a way to connect with people to share and discuss things the people share interest in. You can start a PLN by getting online and joining blogs, twitter, and message boards about what you are interest in. 
  • ...4 more comments...
  •  
    I like this article because it gives teachers a clear definition of what a PLN and how to connect to one. I am new to using social networking professionally so I am interested in learning ways to connect to PLN that would benefit my classroom.
  •  
    Thomas Whitby is an educator that I have followed on Twitter and consider a valuble member of my PLN. So it is fitting that I would include an article written by Mr. Whitby explaining the purpose of a PLN. Mr. Whitby explains that PLNs use social media and technology to collect, communicate, collaborate and create with like-minded individuals. Unlike traditional professional development sessions, PLNs can take place any time and anywhere through the use of the WWW. Each PLN is uniques and serves its own purpose and each member is a potential source of information. Mr. Whitby concludes his article with information on how to build a PLN and links to PLN resources.
  •  
    This article gives the definition of a PLN and answers the question of why they are important. It also talks about potential barriers, this is important! It also has links to other resources for PLNs.
  •  
    This blog post thoroughly defines PLNs, even addressing the debate over its acronym. Is it professional or personal learning networks? This post settles on a happy medium: personalized learning network. This entry goes beyond the definitions as it addresses both the barriers to PLNs and what can be gained from them. It also offers suggestions on how to build a PLN and helpful links.
  •  
    According to this sites definition of a Personal Learning Network, this Diigo group meets the definition ("a tool that uses social media and technology to collect, communicate, collaborate and create with connected colleagues anywhere at any time"). The article continues by stating that each member becomes "a source of information," which leads us back to connectivism, making connections, and learning.
  •  
    This website defines and discusses PLNs as used by educators specifically. This article talks about how to start or get involved in a PLN, barriers educators face in using PLNs, and benefits of using PLNs.
8More

Connectivism and Blogging - Digital Innovation and Knowledge Networks - 0 views

  • Siemens (2005) argues that knowledge exists outside of the learner in technologies that store and organize information.
  • learner makes connections between concepts, opinions and perspectives accessed through their personal learning network, knowledge emerges and learning occurs
  • A personal learning network comprises connections between nodes which are information sources stored in a variety of formats, including individuals, groups, communities, ideas, systems and resources
    • nstringham
       
      PLN definition
  • ...2 more annotations...
  • In connectivism, exploring, discovering and aggregating existing knowledge is more important that inventing new knowledge
  • The learner needs to filter and validate the knowledge by considering the connections through which it was transmitted
    • nstringham
       
      This is a major aspect of online learning that I have noticed many of my students lack: validating the source of the information. They have a tendency to take all information at face value without questioning the source.
  •  
    This blog summarizes why Siemens felt the need for a new learning theory and what connectivism consists of. I like how this post highlights that today there should be more of a focus on finding and putting together existing knowledge in new ways, rather than trying to find or invent new knowledge.
7More

Personal Learning Networks: Implications for Self-Directed Learning in the Digital Age - 4 views

  •  
    A chapter from Carter and Nugent at VSU which has a nice phrase, "Personal learning networks are based on the premise that learning occurs through interaction with multiple people and in multiple contexts through virtual communities." Somehow I like that. It goes into more detail and explores the, 'abstract concept that is learning.' A big read which take more time to go through but has some effective descriptions. Moves on to CoP as well. A chapter to return to.
  • ...4 more comments...
  •  
    Thank you for posting. The article was a little long, but I made it through. I like how it associates PLN to life long learning because that is absolutely what they encourage. I also enjoyed the combination of PLN and CoP. Thanks!
  •  
    This chapter by Carter & Nugent looks at PLNs, their interaction with self-directed learning, and ways educators can promote the use of PLNs among their students
  •  
    A detailed article about PLN's: their roots, ties to adult learning, self-directed learning, and communities of practice. I liked this quote from the abstract: "As learners participate in the multiple virtual communities of practice that comprise a PLN, they require new skills that merit reconsideration of the role of the educator in helping learners to become self-directed in both formal and informal learning contexts."
  •  
    Such an interesting article. I think many are under the impression that technology is going to replace the teacher in the classroom, which is part of what this paper explores in analyzing the impact of PLNs on the learning process. However, I don't believe the teacher's presence can ever be replaced. While certain aspects of the learning process may become more self-directed for student in the digital age, it doesn't invalidate the importance of the physical presence of a teacher. In fact, this article draws a strong conclusion that the question shouldn't be whether or not teachers are needed, but rather how are educators rethinking teaching and learning based "on a model of information and resource abundance." Educators need to be proactive in creating change in the methods and pedagogy of instruction.
  •  
    The article begins by addressing what a PLN is where a learner joins an informal, web-based communities and they create a network so they can learn whenever, wherever they would like. This article describes a PLN in the context of adult education and the role of the adult educator. The article describes what a PLN looks like. Last, it gives ways to help adults to learn in this type of culture and implications for this. As many articles do, this pushes for a change in education and change their model of teaching to fit this digital age.
  •  
    Here is a book chapter that details the theoretical implications of using PNL for Self-Directed Learners. This chapter talks about the different ways that learners learn within COP/PLN and how this learning takes place formally, informally and incidentally.
9More

Response To Post - 8 views

  •  
    Teachers are developing PLNs to connect with other educators and professionals all over the world to stay up to date on their teaching methods and resources. This article gives an overview of why many teachers belong to a PLN and why it is beneficial to their professional goals. I appreciated that the author named and discussed three popular PLNs that I plan on looking into further. They were Classroom 2.0, Edmodo, and The Educator's PLN. I agree with the author completely when he states that "teachers are lifelong learners." This article is a great read for those new to PLNs.
  • ...6 more comments...
  •  
    Edmodo is an LMS so I guess then all LMS would be PLN tools. I guess I never thought of them that way but they are. Ive used Edmodo once before to organize a project among faculty but have mostly used it with students.
  •  
    Staggering number of teachers that are enrolled in Edmodo, which show how the education field truly embraces the concepts of communities of practice. The communities of practice idea has not fully been accepted into the USCG and I'm excited to work to create one.
  •  
    The article is a comprehensive view of PLNs. It gives concrete examples of how to design and grow a PLN. By examining three widely used PlNs, it might encourage more teachers to begin a PLN. I appreciated the statement: Only the teachers who are continual learners [who] work to improve their practice, skills, and instructional strategies can successfully help others learn.
  •  
    Being a teacher your PLN is so important to your growing and developing. This article really focus on that and how teachers us it. It also give example of other services that teachers can use that will increase their ability to find and use information form the internet,
  •  
    Resourced by an edutopia article, I found this information to be both user friendly and helpful. Best of's, design tips, and aspects of PLNs that make people want to be active are included
  •  
    The mention of RSS in this article is very helpful because it is such a simple way to keep track of all your networks. It keeps everything in one location so you only have to open one program to read it all!
  •  
    I loved all of the information on the various tools that can used in managing a PLN, There were several tools I wasn't familiar with and look forward to being able to use in the future.
  •  
    I found this post to be extremely informative regarding how teachers can use PLNs for learning, moreover for modeling learning for their students. The social network portion of this article was authentic to the purpose of this course and aided in making connections regarding the usage of social networks for educational learning tasks. The review of the three PLNs was also helpful as we navigate this course and begin to implement strategies and plans for the incorporation of social networking into our own classrooms.
2More

Bridging the Gaps: Collaboration in a Faculty and Librarian Community of Practice on In... - 3 views

  •  
    This source is a chapter in a book by several librarians from the IUPUI library system. The librarians set out to find ways in which they could collaborate with faculty to promote a more successful information literacy program on campus. The importance of this issue gave them the impetus to form a community of practice. This group consisted of both faculty and librarians who were all dedicated to discovering best practices for teaching and assessing information literacy concepts. The authors concluded the chapter with a discussion of some of the campus initiatives that came out of the CoP activities and what they may do in the future to further the growth and retention of student information literacy skills.
  •  
    Thanks for sharing this article, Kelly. I appreciated the discussion of campus initiatives, including the student pre- and post-surveys, which yielded "abysmal" results. Even with those results, though, the initiative was successful in sparking the campus to start operating as a CoP.
1More

http://pdf.aminer.org/000/122/100/a_grounded_theory_of_information_sharing_behavior_in_... - 0 views

  •  
    This article focuses on what the authors call a 'personal learning space', which includes weblogs, portfolios and social networking. It exams groups dynamics and trust, privacy, and the information life cycle.
8More

Building a Personal Learning Network Will Make You a Better Teacher - 7 views

  •  
    I chose a definition site as my final resource. I think it is important that we are able to clearly and succinctly define what we are exploring. According to this site, "A personal learning network, also referred to as a PLN, is a powerful professional development tool that allows teachers and administrators to connect with other teachers and administrators across the country. These connections are typically made through social media outlets including Google+, Twitter, Facebook, Linkedin, etc."
  • ...5 more comments...
  •  
    I think this is an excellent resource for Personal Learning Network. I agree that we need to know exactly what we are exploring. Often times there is so much information out there, that it is hard to process it all. By knowing the definition and knowing what we are looking for it is easy to focus in and find the best information. I think this is a clear definition and I have added it to my library as a resource for future use.
  •  
    Thanks for sharing...Yes, understanding the similarities of PLN's, CoP's, and Connectivism and differences are key. This article points out that PLN's tend to be more like social media sites: Linkedin, Facebook, etc to collaborate and share.
  •  
    This article takes the readers through the definition of PLN and describes how social media is a major proponent of creating a PLN. The article also connects to other "how to" tools for PLNs and professional development.
  •  
    A personal learning network is a way for teachers to connect with other educators through social media to exchange ideas for growth and improvement.
  •  
    Describes the powerfulness of a personal learning network, its benefits, and how to get the most out of being a part of one.
  •  
    I like the quote "you get out what you put in" it describes the relationships in a PLN perfectly. This post gives many good examples of PLNs that I'm sure many people don't even realize are PLNs. Many teachers like to use Pinterest for lesson plan ideas or decorating their classroom, and what they don't realize is they are working with other people to gain this information. I think I'm a better educator because I am an active user of PLNs and I try to contribute as much as I use others ideas.
  •  
    This article discusses how developing a PNL will make you a better teacher by challenging you to change the way we think about our classroom. PNLs are great because they save time and allow for quick and easy communication in various formats. Educators get to decide which areas they are interested in developing a PNL. I love that this article states that you will get out of it what you put in.
« First ‹ Previous 61 - 80 of 617 Next › Last »
Showing 20 items per page