In the way I weighted grades I gave the "reading assignments" 25% towards the overall grade. I've noticed that when students are getting full credit in these assignments, their overall grade doesn't budge. Yet, when they don't get full credit, their grade goes down. Students are asking me why when they basically get 100% on the "reading assignments" it doesn't improve their overall grade. I can't figure it out myself. It makes sense if you are getting full credit in an area each time than your grade should gradually go up. But it's not. It's only when they don't do well in this assignment area. I'd love to hear people's thoughts on this. What am I missing?