Gogaku had various forms: some were like branch schools of domain-run schools, and others were established for ordinary people; some were established by domains and ordinary people, and others were established only by ordinary people.
形態は、藩が設立し、藩学校の分校のようなものから、庶民を対象にしたもの、藩と庶民が協力して設立したもの、庶民のみの手になるものなどがあった。