extrinsic motivation

Think Thank Thunk is a relatively new blog from Shawn Cornally, a high school math and science teacher. I have found his posts to be quite entertaining. In Shawn's latest post, he talks about grades. You know I like to talk about grades. Shawn puts teacher into two groups in regards to their ideas about grades: " Grades should reflect a student's progress with course material. Where an A+ indicates mastery. Grades should be an amalgam of student's knowledge, behavior, and anything else the teacher wants to control. " I was in the middle of posting a comment to this post, but it was…