My son took your self-paced course over the last year and a half. A few weeks into the course he took his first SAT and scored a 1310. He took his second when he was about halfway through the course, and he scored 1430. He just received his latest score (after completing the course and reviewing the math in particular) and scored a 1510! His math score went up 100 points since the last test. Thank you so much! We have recommended this course to multiple friends, a number of whom have signed up.