Many universities implement an "Open Curriculum", whereby students can decide the courses they want to take without complying with a broader course requirement. For instance, a student that attends a university with an open curriculum can choose to take on all humanities or STEM courses without worrying about meeting an academic requirement for credits needed per subject. In most secondary schools around the world, students are not given a choice as to what courses they can take, or are given a very limited amount of choice within a discipline (e.g. American or World History in history classes).