Motivation has a lot to do with a sense of accomplishment. This sense of accomplishment is different for every person. Some require an A+, others would like to see their score go up by a letter grade. I like to help my students identify their own goal, show them how they are progressing, and make sure they realize how great their progress is. When students feel motivation, they are more likely to keep up with the material, study independently, and reach out when they need help!