The School of Earth Sciences schedules courses on a two-year cycle, with courses offered every semester, once annually in autumn or spring, or once every other year in autumn or spring. All courses required for degree programs are offered at least once per academic year. Additional courses are offered periodically in the summer semester, based on student demand and instructor availability. The below schedule is subject to change and may vary due to faculty leaves and other circumstances. Students should confirm all offerings with the registrar.