Biology- It's not easy

So I have spent almost a quarter now in Biology. One thing I really understand now is Acids and Bases. All I had to do was focus and actually work on it instead of cruising facebook. I also really understand Water Properties and how they work now. I'm thinking it just takes me a little bit longer to understand science then at the pace we were going at. I just have to make sure I don't get distracted on my computer doing something else that I shouldn't be doing. Something I really need to work on is carbohydrates and sugars. I'm having a hard time understanding them. But I know if I stay more focused in class I can keep up and understand things better.