of two or three designated pre-admission courses with grades of B or higher, and a cumulative grade-point average of 3.0. One of the pre-admission courses must be the "proseminar" course for the intended area of study, which is akin to a traditional research methods course. Some disciplines have additional specified pre-admission coursework, while others have specific coursework that is required before submitting a master's thesis proposal (biology and psychology students must take a specific graduate statistics course). In addition, several programs require supplemental application materials; for instance, Creative Writing and Literature ALM candidates must submit original manuscripts. Students who meet these criteria are then eligible to submit an application for admission into the graduate degree programs (ALM). A student who fails to earn a grade of B after twice enrolling in the proseminar course—often considered a "gatekeeper" course—will be denied admission indefinitely. Students who graduate from the Extension School become part of the Harvard Alumni Association. Extension students have dedicated study spaces, conferences rooms, an Extension library, and access to the dining hall in Lehman Hall. Alpha Sigma Lambda, the national honor society for nontraditional students, has a Harvard chapter. There is a student government body for the Harvard Extension School which participates in the Harvard Graduate Council. Admitted degree candidates have access to many of the same student privileges of other Harvard alumni, such as access to athletic facilities, libraries, and museums. Candidates may, for example, access: The class of 2019, the largest class to date, had 1,184 graduates. The graduates had an average age of 37 and were nearly evenly split between the genders, with 54% being male. 49 countries were represented in the graduating class. In 2016, 96% of the students enrolled for professional enrichment. Half took a single course, and half were pursuing a degree. The increase in online course offerings has fueled growth, and students from more than 150 countries are enrolled. In 2017, the school educated more students than all of the rest of Harvard combined. In 2000, there were 14,216 students, with the youngest in their early teens and the oldest in their late 80s. There is often a span of 60 years between the oldest and youngest students, and students as young as 11 years old have taken courses alongside those old enough to be their grandparents. Of the students enrolled in 2000, 75% had a bachelor's degree and 20% had a