The College Board and Khan Academy are offering free SAT prep tutorials to boost scores on the new (as of March 2016) SAT. The site is at https://www.khanacademy.org/test-prep/sat.
Students studying 20 hours through the Khan Academy personalized lessons, on average, showed a 115-point improvement between their PSAT and SAT scores. This was double the average of students who did not use the Khan tutorials.
According to College Board President David Coleman, "It is good news that practice is an equal opportunity employer. And the great news is that it is free."
More information can be found at: https://edsource.org/2017/free-khan-academy-sat-tutorials-boost-scores-study-finds/581450.