Twenty teachers in Surrey, B.C., were told not to show up to work Wednesday after their teaching licences were suspended.

Amrit Sanghe, president of the Surrey Teachers’ Association, told CBC News the teachers missed critical emails about updating their criminal record checks because the notice went to their spam folders.

Sanghe said this is a “significant” amount of teachers pulled from the school system. 

“It’s definitely the size of a small to medium elementary school worth of teachers.”