A part of growing out of adolescence is finding out what worked and didn’t. Academically, MathSmart books had a detrimental effect on my outlook on math. It may have improved my number skills but it was a disservice to my opinions on the subject.
A vast majority of students already disliked the subject. Everyone was just in it to pass. Later on, it seemed like a waste of time and some students thought it was counterproductive. This type of mindset is most likely detrimental to the teachers. In this situation, nobody wins.