I'm presently studying in a high school. And I must agree that it's course is quite good, preparing you for advanced learning. Physics has got an amalgam of motion and kinematics and electromagnetism. Plenty of new concepts in chemistry have been introduced like the atomic structure in terms of orbitals, wave function, the uncertainty principle and Schrödinger equation as well. Also, it includes organic aromatic compounds and stoichiometry. In maths, calculus and trigonometry and 3d geometry and analytical mathematics have been introduced. I dare say, I will be half as smart as some of the members here after 12th.