One, there have been controlled studies. Piano or string lessons given to average students in a middle to lower class neighborhood in LA, increased IQ 6-7 points in one year and continued to increase the second year. The length of study. It also had a strong correlation with math ability.
The Special Music school, in NYC, doesn't give homework the first year and I noticed their first year math was behind DD's curriculum in regular public school, yet by 6th grade, their math scores outperform every other school in the city.
Ren
