The Pre-SAT (PSAT) is a great practice for the SAT and even the ACT. It is also used to identify National Merit Scholars and award merit scholoarships.  The PSAT has two sections: Math and Evidence Based Reading & Writing.  Students in North Carolina take the PSAT in October of their Junior year.

Practice materials for the PSAT are the same as for the SAT.  Practice tests can be found on the College Board's websiteKhan Academy  also offers free SAT practice.