Subway Academy is a school within the other school building. TDSB does this a bunch. 

https://www.subwayacademyone.com/contact says "located just a few steps south of Donlands TTC station on the 3rd floor of Eastern Commerce" using the old name of the main school, it's in OSM as https://www.openstreetmap.org/node/2336695931

https://www.tdsb.on.ca/Find-your/Schools/schno/5360 is the main school which is in OSM as https://www.openstreetmap.org/way/28408664/history - name misspelled - will correct