From reddit http://www.reddit.com/r/Khan/comments/1znhcx/khan_academy_gets_rare_partnership_to_close/ Me: Test prepping does not work very well, so it's a minor issue. SAT and ACT tests are mainly tests of g and one cannot train g. Him: That's a common misconception, but they're not general intelligence tests. SAT and ACT test very specific material that can be studied, so test prep actually makes a huge difference in scores.
Test prepping discussion
Test prepping discussion
Test prepping discussion
From reddit http://www.reddit.com/r/Khan/comments/1znhcx/khan_academy_gets_rare_partnership_to_close/ Me: Test prepping does not work very well, so it's a minor issue. SAT and ACT tests are mainly tests of g and one cannot train g. Him: That's a common misconception, but they're not general intelligence tests. SAT and ACT test very specific material that can be studied, so test prep actually makes a huge difference in scores.