McGraw Hill Education Virtual Manipulatives
McGraw Hill offers a free website with a huge variety of manipulatives that would be great for use in a classroom with an interactive projector.
After picking your grade level, choose the desired background from the list. Pre-K-2nd grade have game board and story board options as well as the workmats that are available for all grade levels.
Next choose a manipulative. Some options include algebra tiles, base ten blocks, currency, clocks, fraction tiles, geoboards, geometric solids, hundred chart, tangrams, thermometers and many more.
Use the tools at the bottom of the screen to move, type text, draw or measure objects on the workmat.
After picking your grade level, choose the desired background from the list. Pre-K-2nd grade have game board and story board options as well as the workmats that are available for all grade levels.
Next choose a manipulative. Some options include algebra tiles, base ten blocks, currency, clocks, fraction tiles, geoboards, geometric solids, hundred chart, tangrams, thermometers and many more.
Use the tools at the bottom of the screen to move, type text, draw or measure objects on the workmat.