31 Senior High School Jakarta or Sekolah Menengah Atas (SMA) Negeri 31 Jakarta is one of the Public Schools in the Province of DKI Jakarta, Indonesia. Similar to all high schools in Indonesia, during the school education in 31 Senior High School Jakarta taken within three years of lessons, ranging from 10th Grade to 12th Grade. It founded in 1978. It has 30 classes and ±900 students (30 students/class for 10th Grade, 11th and 12th Science, 11th and 12th Social, and 20 students/class for 11th and 12th Language). 10th Grade has 10 classes from A to J, 11th and 12th Science have 4 classes, 11th and 12th Social have 4 classes, and 11th and 12th Language have only one class.