Lets see....from the Ministry of Education:
36,000 full and part time teachers (2:1) w/ average age of 44. ~11,500 would be eligible for retirement within 5 years but we need 22,000 replacements?

Also, from the Ministry's stats, the majority of class room sizes were below the cap with the rest being manageable. Only 1,385 classes of 70,620 were over 30 students. The "crisis" is simply a function of the Collective Agreement. Nothing more

Glad you weren't my Teacher