math has a stigma of being hard to understand. so kids approach it as something that isnt going to be easy. they discourage themselves and even prevent themselves from seeing the answers! (i know this because i taught math and kids would get the right answer, but not be sure). Also, math is really like a second language. there are rules and laws and without PRACTICE you cant learn a new language. Kids dont practice math. The US needs to focus more schooling on math and science related courses.