Motivation, study habits -- not IQ -- determine growth in math achievement
Got this from Research blogger! Love people who do meta-analyses. The difference between our schools and other countries, I believe has to do with this. We focus on direct instruction and don't teach enough good study habits. If you're good at something, and it's competitive -- our schools tend to reward "perfection." Learning requires making mistakes without penalty, except you're own awareness of how to correct it and why.