The document summarizes two topics related to education in the Philippines:
1) The Philippines' previous education system included one year of preschool, six years of elementary school, and four years of high school. Primary education is compulsory according to the 1987 Constitution, though not all children receive preschool education.
2) Prior to colonization, the Philippines had at least 16 different writing systems, including Baybayin which was widely used in coastal regions in the 16th century. The pre-colonial curriculum focused on basic literacy including reading, writing, and arithmetic.