Newcomer....we purchased an on-line tutorial from the Princeton Review....it was a tremendous help....and significanly raised son's SAT scores. Can't say enough about how good it was.....audio, and hard copy also provided......we purchased it 2 years ago.....$400.00. Seems like a lot of money.....but based on his SAT's and GPA.....son is receiving an academic scholarhip that makes the $400.00 the best investment, for return on the dollar, that we will probably ever make....
Two things.....before purchasing the tutorial.....we got a committment from son that he would make the time to study....he promised...and understood there would be consequences if he did not.....
Secondly.....I can only speak for the Princeton Reveiw tutorial....do not have any info on others that may be out there.....
Good luck!