What About When Khan Fails...

We were studying Absolute Value Equations today. I needed more simple ones than Khan provided.  So, I had to put aside Khan for a while to play an online video game with simpler problems.  It was at http://www.math-play.com/Absolute-Value-Equations/Absolute-Value-Equations.html and it worked very well to help students be familiar with the simpler equations before going on to the more difficult Khan equations.  Again, I need to make sure my rigor is identical for the students.  Khan expects more out of the than the book does.