Try studying together with your friend(s). Usually I do this 'Cause helps me to cover more topics and to UNDERSTAND difficult topics. When you study with your friend(s), you can learn the topics which you don't know and you can teach them the topics which they don't know (you help each other).

Make sure your study buddies are also interested in getting good grades (So your study group remains a study group but not something which you don't wanna imagine😏).