This Etoy lets you play with number grids. Kids can click on tiles to color them. For example kids could color every 2nd tile, or use the tiles to create the Sieve of Eratosthenes. The grids start with zero, but we can modify to start with 1 as well. The grids are contained inside a holder so that you can resize them to see different patterns. Kids can use the feature that allows them to "color" the squares to document and report on the patterns they find. They could also write scripts to color every N tiles or create their own Sieve of Eratosthenes algorithm. I think this project would work well on a SmartBoard or touch screen device.
What do you think? How can this be used to teach, to learn? Do you have any links or ideas on lesson plans using a tool like this? Please share your thoughts and links, comment below or blog about it and let me know.