Google Spreadsheets allows you to insert gadgets to display data in a variety of ways. The following is a list of gadgets created by Google, though you can use a variety of additional third-party gadgets as well.
There are useful and useless things in Google Sites. It is free but it is more a business tool than an educational one. But it can start as a business game and then someone can use the social mobile template to start socializing. - post by kirdim1313