High demand for teachers means schools could be vulnerable to hiring irresponsible staff.

22 people were struck off the teacher's registry last year - seven over sexual misconduct.

School Trustees Association president Lorraine Kerr told Rachel Smalley a shortage of teachers could mean schools hire more desperately.

But she believes the appropriate checks and balances are in place, as long as schools stick to them.

"We just have to keep being rigorous about our processes, and we have to have an unrelenting focus on our processes," she said.

LISTEN ABOVE AS LORRAINE KERR SPEAKS WITH RACHEL SMALLEY