More commonly known as "high school" (Filipino: paaralang sekundarya, sometimes mataas na paaralan), consists of four levels largely based on the American schooling system as it was until the advent of the comprehensive high schools in the US in the middle of last century. The Philippine high school system has not moved much from where it was when the Philippines achieved independence from the US in 1946. It still consists of only four levels with each level partially compartmentalized, focusing on a particular theme or content.
The first year of high school has five core subjects, Algebra I, Integrated Science, English I, Filipino I, and Philippine History I. Second year has Algebra II, Biology, English II, Filipino II, and Asian History. Third year has Geometry, Chemistry, Filipino III, and World History and Geography. Fourth year has Calculus, Trigonometry, Physics, Filipino IV, Literature, and Economics. Minor subjects may include Health, Music, Arts, Technology and Home Economics, and Physical Education.