> > On Jul 8, 2013, at 6:07 PM, Richard Strausz > <Richard.Strausz@farmington.k12.mi.us> wrote: > > > What would you have a geometry teacher do when > facing a student who didn't master completing the > square in his past? I say 'let him sing the darn > song! > > I would teach him how to complete the square. > > Why isn't that your first and only answer? What the > heck good is the song going to do this kid? > > Bob Hansen
He can apply the formula even if he doesn't know why it works. I do offer to meet with the student outside of class to go through the derivation. You might be surprised to learn that many (most?) just want to use the tool. As a geometry teacher I am sensitive to focus my classroom time on geometric content.