Nearpod.com is a website platform for use of schools or individual teachers to deliver lessons and assess content knowledge and critical thinking in students of all ages. There are plenty of free pre-made, Common-Core aligned lessons, and teachers can create their own as well, integrating videos, slideshows, multiple choice questions and open-ended quizzes into the interactive lessons. Teachers can synchronize student devices in the classroom and get real-time student feedback and responses as students move through the interactive lessons. Students simply enter codes to join a "live lesson" and work collaboratively or independently through the modules. Through the teacher account, teachers can observe individual students' activity in real time and assess whether or not they are on task as well as if they are grasping the content correctly. Below I have linked the general website as well as an example of a free, pre-made lesson integrating many different online learning and assessment methods!
https://nearpod.com/s/home
https://nearpod.com/s/general/8th-grade/the-civil-rights-movementa-time-to-speak-L34887790

The Digizen website is an online resource that provides information and interactive games to teach parents, teachers and students about Digital Citizenship. The resources provided promote digital citizenship in students by sharing advice and information on many topics such as social networking and cyber-bullying. The resources are aimed at teaching students about how their online behaviors and experiences affect themselves as well as others. There are plenty of informative films, case study interviews, and interactive games. The websites also have a social network evaluation feature that outlined the pros and cons of many of the most popular media and social networking sites, including their safety and privacy settings, types of advertisements, terms of use and level of adult/mature content. One of the most highlighted parts of the website is the "Digizen Game," which corresponds to a linked cyberbullying video, called "Let's Fight It Together". The game allows individual players to support others who are facing negative online experiences, as well as informing the players about in-and-out of school appropriate digital behaviors. Attached below are a link to the general website as well as the Digizen interactive cyber-bullying and internet safety game.

http://www.digizen.org
http://www.digizen.org/resources/cyberbullying/interactive/

The Digital Passport is a wonderful website that can also be linked to an existing Edmodo account as an app within in the website. Schools can sign up with larger accounts, or teachers can simply create single classes for free. The website provides web-based games and videos that can engage elementary students in learning about digital safety, respect and building safe online and offline communities. While many of the videos and activities are independent, the website also offers teacher resources that encourage collaborative whole-class activities. Online, students get to create a username, earn "badges" for completing activities and the reports are sent directly to the teachers' account. Teachers can integrate this into their classes as single lessons, or create a year-long curriculum with modules and corresponding activities to be completed over time. Also, students can download a printable workbook in English and Spanish. The website offers lessons for parents as well, which could be effective in maximizing the effectiveness of lessons ranging from internet safety, to cyber bullying, to copyright infringement/plagiarism and the difficulties of multitasking with many mobile devices. Below I have attached both the direct link to the website's educator resources, as well as an FAQ page from the website host, CommonSense.Org.
https://www.digitalpassport.org/educator/materials
https://www.commonsense.org/education/digital-passport

iCivics is an educational resource website with many different free lessons, teacher resources, game-based learning apps, and situational decision-making online games. The website's mission is to provide free resources to Civics teachers (many of the resources can be applied to U.S. history, ethics, English, and other social studies or even science teachers at all different grade levels) that can enhance their students' learning experience and provide motivation and interest in classroom learning. The site supplies supplemental teaching materials such as lesson plans, entire curriculum units, online essay-writing workshops, web-quests and document-based question challenges. Each learning tool is connected to specific and clear learning objectives, and has coherent, succinct directions for teachers to follow in order to implement the lesson materials successfully. The most exciting part of the website, which I often send links of to my students, are the games! Ranging from a campaign race to the white house, a navigation of the country's court systems, and a scenario game about immigration laws, to a game where the player can raise or lower taxes to try and balance the federal budget. What is most exciting for students are the leaderboards they can strive for, the "achievement" medals they can accumulate, and just the sheer video-game quality of interaction that can engage even the most uninterested students! In my opinion, these games and lessons can be implemented and prove useful at any age or education level, but I could see a very exciting use of them in elementary or middle schools to complement any social studies or civics curriculum!
https://www.icivics.org (https://www.icivics.org/)
https://www.icivics.org/games/win-white-house

When searching for a communication tool different from those that were already reviewed by my peers above, I came across an EdTech blog that suggested "PollSnack" as a communication aid for teachers. Access to the website can be granted through an email sign-up or through most pre-set up social media accounts like twitter, edmodo, facebook and the like. The website is a simple poll or survey generator, but can be used in many different ways to communicate with students and parents, as well as creating dialogue between the students themselves. Polls and surveys can be created in any language, the data is compiled for you, and the links can be embedded in any other website for easy accessibility. Teachers can use PollSnack at the beginning of the year to learn more about their students, they can use the tool to set up unit pre- and post-assessments, encourage parent involvement and even create easy to use online quizzes for students. The quizzes, polls and surveys are easy to create, the website is very user-friendly and you can add as many questions as you want! I created a short sample quiz and embedded the link above for anyone to try out!

http://www.pollsnack.com (http://www.pollsnack.com/)
http://snack.to/q7xiynpx

It is truly a topic "library" where students and teachers can freely create, share or download inquiry-based discussions on any topic. Teachers can use pre-made discussion boards and send students links to respond and chat with each other about the topic, or they can create their own unique URL to share with students about a new topic.

http://library.collaborizeclassroom.com/#!