Sal Khan made a series of videos that go through all of the practice problems in The Official SAT Study Guide. Since he put out those videos, the textbook company has created a new edition. The eight tests that Sal went over are also in the new edition, but have been reordered a bit. What I have done is realigned the videos so they match with The Official SAT Study Guide, 2nd edition.
In order to use these videos effectively, purchase The Official SAT Study Guide, 2nd edition. Take the practice tests and use these videos to go over the problems in each section.