All three types of science high schools in the Philippines (STEM high schools, high schools in the Regional Science High School Union and the Philippine Science High School System) offer a curriculum placing importance in mathematics and the sciences, as well as research. It is noted though that the RSHS Union and the PSHS System have much higher standards of science and mathematics education than STEM high schools. Likewise, STEM high schools and the RSHS Union are operated by Department of Education, while the PSHS system is operated by Department of Science and Technology.