High school is a grade of education from Standards 8th to 10th. Usually, students from ages 12 to 17 study in this section. These schools may be affiliated to national boards (like CBSE, ISC, and NIOS) or various state boards. In high school the basic education is given. Like in Mathematics introduces trigonometry and its applications, geometry and its theoroms, algebra etc. Also a high school student studies subjects like Social Sciences where comes History, Geography, Humanities, Economics etc. Physics, Chemistry, Mathematics, Biology, English, Hindi and your Mother Tongue( for me Malayalam ) and IT. So a high school student has to manage like 10 subjects together.
The high school education or say school education gives you all the fundamentals that you required for further movement. Standards IX and X are also called Secondary School.