This three-storey public high school opened in 1962 for the Scarborough Board of Education until its closure in 2000 due to low enrolment.

Throughout its existence, Midland's academic and athletic programs were flexible, relevant, and student-centred with courses designed to include various instructional techniques catering to its diverse population.

Its facilities include a greater auditorium, swimming pool, rounded cafeteria and larger technical shops.

Midland S.S. was constructed in 1961 and opened its doors on September 4, 1962 under its first principal James Hamilton as Scarborough's eighth collegiate and the first composite secondary school.

[2] The sections of the original building such as the commercial and technical wing was erected in 1963, followed by the addition of 11 classrooms along with the swimming pool built in 1964[3] and the library in 1974.

The school body had also undergone a demographic shift from an influx of new immigration to the nearby area since the early 1990s.

[7] Meanwhile, in April or May 1994, a student tipped the school administration to a hidden cache of knives and high-powered ammunition and stated that there was a fight planned.

Since the physical building was large with a good state of repair, and the population was smaller, it was placed high on the list.

The Toronto District School Board reoccupied parts of building beginning in 2005, establishing South East Year Round Alternative Centre and Safe and Caring Schools Program Area C in the process with the Staff Development in the basement (later moved to Thomson Collegiate).

It included many modernist design features including five stairwells, a circular cafeteria that looked onto Midland Avenue, a two floor library with two seminar rooms, wide guidance area, larger atrium, and a larger auditorium with more than 928 seats in which this school boasted as one of the acoustic auditoriums in Ontario.

Midland offered many academic resource opportunities for assistance and enrichment along with its ESL, co-op and transitional credit programs, leadership opportunities for all students, a strong music, visual arts and drama department and their excellent facilities to provide a broad based technology program.

It then participated in the SSAAA and TDSSAA in basketball, baseball, softball, football, ice hockey, wrestling, track and field, cross country, gymnastics, soccer, and other sports.