Data based on 2 reviews.
Use the practice tests and get help if you don't understand. If you pay attention in class it should be very straightforward. People only get behind if they don't do homework or practice tests.
I love Ms. Calvin, super nice and funny, she wants you to do well in her class and will help you if you ask. She posts everything online, fun 'data collecting' activities, helpful homework, group quizzes are very similar to tests (easy if you pay attention) lots of extra credit, ended with an A+