Katie,
Unfortunately there is not an easy formula which guides us to get good grades in school. It is not only being focused in school and listening to your teachers, but you also have to find the time to do your homework well and, very important, you have to ask for help anytime you need it.

Here in our website we can help you to all your science questions. Whenever you have a question or you feel that you do not understand something from school, do not hesitate, never, to ask for help. If you have to ask many times before some concept becomes clear to you, it is OK. This has been my secret all through my life as a student and as a scientist. Ask, ask, ask.

Nowadays there are many resources which help you to learn well, use them wisely. The Khan Academies have great videos you can watch .

If you have any science question, please feel free to get in touch with us. You are not alone, remember!