These Virtual Manipulatives can be used by individuals or small groups of students or shared on an interactive whiteboard.
In the simple and intuitive UI, first select a grade level from Pre-K through 8. You then have a choice of several background workmats suitable to the chosen level. Then select any of a large number of level-appropriate virtual manipulatives.
Among the tools you have to choose from are algebra tiles, geoboards, fraction tiles, base-10 blocks, geometric solids, currency, and many more.
At the bottom of the Virtual Manipulatives window is a toolbar with text, drawing, measuring, timing, and other tools.
DISCLOSURE OF MATERIAL CONNECTION: http://cmp.ly/0