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A nice maths whiteboard resource where users make flag with fractions of colours. http://ictmagic.wikispaces.com/Maths

Lots of data displayed in an interactive way. Great for use with an interactive white board. Easy for students to gather data, display, and report.

Enter your zip coade to see US census data and comparisons with neighboring zip codes. Great data site for data that is engaging to students, can be represented in multiple ways, and potential for predicting future trends.

Movie box office data that is current and very comprehensive. Several different trends are easy to track including exponential, and log functions. Great for using with students to create regression models, making predictions based on the models, checking the results and re-analyzing. Also, when a movie doesn't follow the predictions there are often easy to understand reasons for why the movies behave differently (a holiday weekend may cause the movie to gross more on a given weekend than predicted, etc.)

"Visualize your numbers, explore charts, and share insights with others. " Great data source. Students can explore data sets, identify different ways of representing data, as well as identify different characterisitics of data.

I love the Wolfram Alpha site, if it does ignite another math war, then I'm OK with it. I think what it means is that we have to ask students different questions, ask them better questions, make them create their own problems, interpret their answers, decide what methods are most efficient and why, but don't stop asking them questions just because some are going to use the available tools.

The Middle School Portal 2: Math and Science Pathways project (MSP2) is a component of the National Science Digital Library (NSDL) that supports middle school educators and youth by offering contextualized, high-quality resources and promotes interactivity, collaboration, and knowledge-sharing among its users. Educators can access MSP2 to increase content knowledge in the areas of science, mathematics, and technology, and to build knowledge on developmentally appropriate pedagogy for youth aged 10 to 15. MSP2 also connects middle school youth to fun and engaging information on math, science, and technology, as well as health, safety, and career exploration. Web tools such as blogs, wikis, podcasts, RSS feeds, and social networking services are being used in the continued development of MSP2 to transform passive, text-based information into a dynamic, collaborative experience that promotes the creation, modification, and sharing of resources, and facilitates professional development. MSP2 is a project of The Ohio State University, National Middle School Association, and Education Development Center, Inc., and is funded by the National Science Foundation.

Dozens of online math manipulatives K-12

 ***** "The National Library of Virtual Manipulatives (NLVM) is a library of uniquely interactive, web-based virtual manipulatives or concept tutorials, mostly in the form of Java applets, for mathematics instruction (K-12 emphasis). The project includes dissemination and extensive internal and external evaluation." 

A case study of a teacher using twitter to collect probability statements in natural language

Mathematics has a reading protocol all its own, and just as we learn to read literature, we should learn to read mathematics. Students need to learn how to read mathematics, in the same way they learn how to read a novel or a poem, listen to music, or view a painting.

Pattern blocks are great tools for developing conceptual understanding. I hope to continue to see them used in classrooms, but the virtual kind can allow students to share their thinking with other students virtually. I like using screen capture, cut/paste, upload to a wiki, comment on characteristics/size/description of '1'/and sharing with students so that their thikning can be revisited from multiple venues (home, classroom, internet-broader audience).

Play these online or on the Wii

The website says: "THE Place For Educational Games!Our research-based and standards-aligned free educational math games and language arts games will engage, motivate, and help teach students. Click a button below to play our free multi-player and single-player games! In the future we'll add features enabling you to save records, tailor content for differentiated instruction, and pinpoint student problem areas." I think using the games in conjunction with a holistic approach to developing skills would make for a great way of getting students to practices some skills. Let students play, set goals, monitor those goals, reflect on their progress, and apply strategies/heuristics to specific problems they struggle with would create an environment in the classroom where learning was fun, self-monitored, and successful. 

Large collection of math activities, lessons, standards, and web links from the NCTM