Most American students rely on their regular school education for their study. Outside of school, they do assigned homework to deepen their understanding of class material and occasionally get help from a parent or tutor. On the other hand, numerous Thailand students enroll in private academies after school, where there are teachers who teach the same material taught at school. These private academies also distribute additional homework for students. Numerous private academies are intensive. They open intensive courses during vacation and also make students stay at the academy until 11 PM.