Manipulatives

This week in class we make the frogs and launchers. My partner and I had so much fun seeing how modifying our frogs affected how far they would jump when launched. We we so busy finding which of our frogs jumped the farthest that we didn't even notice that we were figuring out the range and the mean.

I wish that I was better at using the tangrams and making the shapes/ animals. I really struggled with this activity especially with seeing the shapes. I'm wondering if there is an app I can find on my phone that that gives the tangrams as a virtual manipulative so I can practice. When teaching a less like this, what do I do with the students who are like me, and just don't get it??