Teaching Table is an iPad app that allows math teachers to create highly interactive lessons and then share them with others. Rebecca Litovsky, Paul Ingram, and I created it three years ago in one summer.
The UX is a bit dated, but the technology is still there. Students can almost feel the coins, and counting blocks; create their own custom fractions (1 and 5/3), and drop them into a Counting Area which then gives them the correct added value.
We’re looking to expand the app soon. Are you an iOS/Android or Web developer and interested? E-mail me your resumé to arie “~~at~~” openset.co