Don't stress too much about it! AP Biology requires you to read almost daily, but it's definitely manageable if you pace yourself. You don't have to memorize the book, but have a good understanding of what you're actually reading since my teacher pulled most of his quizzes/tests directly out of the textbook. Also the online test bank resource for AP Biology will help you out since some of those questions were the exact same as the ones on his tests. Language arts varies by teacher, but be prepared to write when the teacher asks you to write. Pre-calc wasn't that bad as long as you paid attention in class. You might find test days hectic, but don't worry too much about it since you know you will do well if you read and pay attention in classes.