Your grade goes up when you score higher on assignments and tests, so in order to improve your grade, you must improve your individual scores. To do so, a student should set aside time to study and memorize the material. If there's something they don't understand, they need to take proper measures - such as talking to a teacher or librarian - to be sure they do in the future. In order for this to happen, a student must preform well, which requires a nourished body and mind. Getting enough sleep, food, and water are very important as well. Coming to class on time, well-rested, and fed helps aid the learning process as well as overall grades.