Gordon,
You are very generous to invite students to have participation in the decision making of grades and weights of graded material. Although I do believe students are often a bit more analytic and critical when they are asked to "vote" on institutional or class policies, I think care has to be taken to be sure that true learning is being measured. If I feel good about answering that question, then it really doesn't matter how I arrive at the answer.
Barry Westling
