Here are a few online resources to visit for biology. Videos can be powerful learning tools! Here’s a strategy you might try.
This exercise will show you what you know and where your knowledge gaps are. Try this exercise with a study partner. Take turns teaching the videos to each other and asking hard questions. Learning is doing!
Crash Course Biology https://www.youtube.com/playlist?list=PL3EED4C1D684D3ADF
Khan Academy Biology https://www.khanacademy.org/science/biology
MIT Open Course Ware Biology http://ocw.mit.edu/courses/biology/
Sumanas Videos http://www.sumanasinc.com/webcontent/animations/biology.html