If you teach with an iPad, then you need a ruler that won't touch the screen. This product does the trick. I made mine out of wood. When teaching algebra or geometry, I needed to make straight lines. This tool allows me to do that when the app does not have a line tool. a straight edge for making lines in an app like Notability.
by William Anderson Stultz
is licensed under a Creative Commons Attribution-NoDerivs 3.0 Unported License