I decided at the beginning of the year that participation would count for 10% of the quarter grade in my classes (I have a very specific rubric, it encompasses behavior, preparedness, participation, etc). I teach a senior (12th grade) elective (psychology) and am starting to feel like 10% isn't enough. I plan a lot of mini-experiments and spend a lot of time attempting thoughtful discussions. Due to this, the class just doesn't work when the students don't participate. I just did grades for progress reports and feel like a lot of students are getting A's and B's that don't deserve them. They do all their homework and do well on the tests, but they never contribute to class discussions and practically have to be begged to participate in any sort of experimental activity. I feel like 50% of the students in my class are the ones who run the whole class. They raise their hands, they lead group activities, they talk during the group presentations, etc. However, because participation is only 10%, the other 50% manage to get a good grade even though they don't do a hell of a lot. So, I'm at the point where I want to increase participation from 10% to 15% or even 20%, but then I feel like that's crazy. Any thoughts on this?