Here is data from Stascan (official government source) about teacher salaries for 2016/2017 broken down by province, which is important. Much like states in the US each province is different.
https://www150.statcan.gc.ca/n1/pub/81-604-x/2018001/t/tblc....
One of the stronger public teachers unions is in Ontario. For Ontario the pay starts out at $51,904 and tops out at $95,794, which is some distance from $140,000.
The best for teachers is Northwest Territories, likely teaching in remote fly in/out communities. Teachers in NWT start at $78,600 and top out at $111,883.
Weighted averages for all of Canada based on the number of educators getting the salary gives a pay scale from: $53,163 - $88,746