<p>I know java and I'm taking AP CS at my school. My teacher sucks at teaching though and I haven't learnt anything all year (That's a big deal cause I have no idea about how gridworld works)...
How do I take the month that I have left and efficiently study for the AP test to get a 5? Does anyone have any good online resources, or even better, an online AP CS course that's free? </p>
<p>Get Barron’s… Trust me I got it last year and my teacher sucked. Even though I only got a 4, I started cramming about a week before the exam. Good luck!</p>