I'm a little confused what a percentage could mean, in this context. Does it mean you have a good understanding of 65% of the material you need to move on? Beca

I'm a little confused what a percentage could mean, in this context. Does it mean you have a good understanding of 65% of the material you need to move on? Because that's not good, if you need an understanding of 100% of Foo to learn Bar, which incorporates Foo... this isn't to say that you shouldn't start teaching Bar in order to motivate students to go back and finish learning Foo, just that a % is a measure lacking in meaning. I think a better way to gague knowledge is the A/C/F system a lot of my professors used in advanced math courses at Rutgers. An 'A' means you have a solid understanding of the material, a 'C' means you don't really understand it, but have a good enough grasp that you can move on and back-track to finish learning it as necessary. 'F' means you don't understand it well enough to move on, and should retake the course. This requires a lot more thought on the side of the professor, but the motivation for students becomes a lot more clear: understand the material, and move on.