To measure the benefits of expensive test prep, you would need a control group of students that self-studied for the ACT the same amount of hours over 9 months. How much did 9 months of private tutoring cost?
To measure the benefits of expensive test prep, you would need a control group of students that self-studied for the ACT the same amount of hours over 9 months. How much did 9 months of private tutoring cost?