There are so many tools I used as a student that are now available virtually on iPads. One fabulous free app that fits into this category is the Geoboard. Forget about rubber bands snapping around your classroom. The virtual geoboard has everything you need to teach polygons, area, scaling and symmetry.
Check out my Common Core aligned iPad lesson plan using this app!
Check out my Common Core aligned iPad lesson plan bundle that includes a lesson using this app!