That's undoubtedly true, but time alone isn't enough. Achievement in poorer schools is lower as well; in some schools the only math that students really care ab

That's undoubtedly true, but time alone isn't enough. Achievement in poorer schools is lower as well; in some schools the only math that students really care about is decreasing their odds of being assaulted between classes, and doing well in class (esp math) isn't helping those odds