I've had a lot of frustration this year with students that aren't willing to try. I often hear, "I can't" or "I don't want to" or "this is too hard." There have been several nights when I have laid awake thoroughly depressed over my inability to motivate them. Then I stumbled across something interesting on Pinterest (yeah, Pinterest!) yesterday: the concept of growth mindset vs. fixed mindset. I spent the next two hours (oops! forgot about dinner) reading everything I could find. It all…