Original school (1959–2019) On July 14, 1953, the Scarborough Township Public School Board Area No. 2 (the forerunner of the
Scarborough Board of Education and later the Toronto District School Board) acquired 8.6 acres of land on Lawrence Avenue East west of Brimley Road for the future secondary school known as
David and Mary Thomson Collegiate Institute splitting off the population of
Winston Churchill Collegiate Institute and
R. H. King Collegiate Institute and expanded later to six acres. It opened as the sixth secondary school in the borough.
W. A. Porter Collegiate Institute, the fifth, had opened the year before. These two years marked the beginning of a rapid growth period in the Scarborough school system necessitated by equally rapid growth in business and industry and in population. The school underwent additions in the 1960s and 1970s including extra classrooms, new gymnasia for girls and boys, science labs, an enlarged library, and vocational shops. In 1989, following the loss of
Tabor Park Vocational School to the Metropolitan Separate School Board, Thomson became as a third campus for
Scarborough Centre for Alternative Studies; the latter moved to
Centennial College in 1994. In June 2000,
Midland Avenue Collegiate Institute was closed; students in its former catchment area are now served by Thomson. The capacity of the original facility is 1,623 pupils. As of the 2018–2019 year, the number enrolled is 997. Thomson C.I. celebrated its 50th anniversary in 2009 and 60th anniversary in 2019 to commemorate the closure of the original school building.
Move to Brockley Drive (2019–present) , rendering the Thomson site surplus. On February 4, 2009, The Toronto District School Board approved a plan to merge David and Mary Thomson with the neighbouring
Bendale Business and Technical Institute to form a modern "superschool". In June 2012 the Toronto Lands Corporation declared the Thomson site (12.3 acres) and building surplus. The land on which Thomson is located was donated by the family of
David and Mary Thomson and there are no plans to protect and designate the site under the
Ontario Heritage Act. Various boards and public bodies expressed an interest in buying the property, including the
Toronto Catholic District School Board,
Conseil Scolaire Viamonde and
Conseil scolaire de district catholique Centre-Sud. In early 2013, Viamonde offered to purchase the property for future use as a high school, but then withdrew the offer because they had not received ministerial approval. Both the Thomson and the Bendale sites are now slated to be used for housing, Per regulation 444/98, other public agencies should be given the right to make an offer before the property is placed on the open market. At a protest rally organised by GBAT in February 2015, more than 160 signs were distributed. In May 2015 the local councillor, Michael Thompson, announced that an agreement had been reached with the school district to reserve almost 3 acres of the site for community uses, including a daycare centre that is to be part of the new school; many felt this was insufficient. The city approved the purchase of 2 acres of the site under this plan. In April 2017, construction of the new school began on the racetrack and sports field of Bendale BTI. The new school, under its project name,
Lawrence Midland Secondary School, is designed in conjunction with the architectural firms of ZAS Architects and Taylor+Smith. The new school was originally expected to be scheduled to open in September 2019 on Brockley Drive. Due to delays regarding construction issues ranging from weather to workers strike, the merged Thomson-Bendale student body operated from the existing Lawrence building until construction was completed. Thomson's new building officially opened on December 10, 2019 and features a four-storey modern building, cafetorium, two double gymnasiums and school-wide WiFi. As of August 2020, the former Lawrence building is undergoing demolition. ==Logo==