This lesson plan outlines a really engaging activity you can run with your learners using Android Tablets and Smartphones. I tried it on an ASUS Eee Pad and it works really well. The Skitch App lets your learners take and edit photos of different situations in which forces affect the shape and motion of the object. The learners can add force arrows and labels. This activity also gets learners to peer assess each others' work by creating quizzes on PhotoPeach.com using the photos they took and edited in Skitch!
Skitch the Force