For a short amount of time, in 1958–1959, there were so many students enrolled in the school (approximately 7,000) that the school day was split into two parts so that half of the population attended in the morning and half in the afternoon. The largest graduating class was the class of 1970 with just under 1,100 students, just before the opening of Maine North High School. Prior to that, graduating classes of about 1,000 students were in 1959, just before Maine West High School opened, and the Class of 1964, just before Maine South High School opened. When Maine North High School closed in 1981, a majority of the students from that school were sent to Maine East, with the remainder being sent to Maine West High School and Glenbrook South High School.