What prep should I do for the SAT and ACT?

Would you recommend a prep class? Or a prep book? If you recommend a prep book, which one? Thanks!

@Cubbybear There are many threads and discussions on this already. Whether you should take a prep class varies by person.

@Cubbybear That depends… when do you want to take the SAT/ACT? Have you tried any of the practice tests yet? How have you scored…