Hey,
I'm willing to help with some classes.
I'm pretty good with Bible, Psychology, US and World history and biology (my favorite science).
Also, I would like to post a link to a very useful studying website I am starting to use more often.
Quizlet
This website is great! You can make flash cards, quizzes, play games (scatter and space race), studying other languages is possible, and there are a lot of different ways to upload info, they have a mobile app for both IOS and Android (where all info syncs between the app and website) and they also offer very wonderful support if you need help (responding to emails within a day or two).
The best thing: everything is free! You can create up to five sets but that is plenty because people generally take four to five classes in college anyways and not all classes in High school require this type of studying (art, PE etc.)
Hopefully this helps someone!