How can I improve my grades in high school?

Talk to your teachers to better understand why your grades do not reflect your knowledge and effort. Are you studying terms solely to memorize them when your teacher expects you to know how to apply them? Is your teacher basing exam questions more on the textbook than in-class lectures or vice versa? Also, be sure that you are not leaving easy points on the table by failing to turn in assignments (or turning them in late). Class participation is another category that many teachers consider when calculating a final grade. Convince your teachers that you sincerely want to understand the material. Teachers are more likely to round up and offer extra credit to sincere students.