For years, I have read SAT reports about test results. What you always see is that student scores are correlated with family income. See here for some good graphs.

What I noticed this year for the first time was that the College Board (which administers the SAT) is promoting Khan Academy, a private venture funded by the Gates Foundation. The release says that students who got their SAT prep from Khan Academy got higher test scores. The partnership was revealed earlier this year. The courses are free.

In the past, SAT prep has been characterized by paid courses and the ordering of thick books to help students master word-comparison exercises and memorize the so-called “SAT words.” Official SAT Practice on Khan Academy provides online resources that are tailored to each student to help them pinpoint which skills they need to improve. As they practice over time, their study plan will evolve with them and help them level up to more challenging skills.

When I was in high school, we were told explicitly that coaching did not affect SAT scores. That has since been disproved and the College Board now encourages coaching and tells you where to get it.

Never forget that the College Board is a business, always looking for market share.