The WebGL Globe is an open platform for geographic data visualization. It was created by the Google Data Arts Team and is still in early development. Users are encouraged to copy the code, add their own data, and create their own globes. The user generated visualizations can then be featured on the project’s website. The WebGL Globe is able to display a JSON file. It requires latitude, longitude and the magnitude related with the location. It would certainly be interesting to visualize education related data with open data from the Worldbank, OECD and others.
The National Council of Teachers of Mathematics website is full of mathematics activities. It also provides a reviewed list of hundreds of links to websites that are not hosted by NCTM itself. An editorial board reviewed and classified the weblinks collection. The users navigate the collection through five categories reflecting the national standards in mathematics education: Numbers & Operations, Algebra, Geometry, Measurement, and Data Analysis & Probability.
This is a great resource that curates the treasures of mathematics activities on the web.