This is why when I taught in college I NEVER gave out group assignments. I'm not trying to test whether the best student knows the material; I'm trying to test

This is why when I taught in college I NEVER gave out group assignments. I'm not trying to test whether the best student knows the material; I'm trying to test whether all the students know the material. As the person who regularly carried such groups when I was in high school and college, I was especially sensitive to this.