Disclaimer, I was out of school before covid so some things have probably changed. I believe lessons run for 13 weeks plus a final for each class. 2 classes per year. You go to class once a week for 4 hours in the evening. Unlike electricians, we don’t lose working hours for school. Some classes are tougher than others. 400,600, and 700 are probably the most difficult. They avoid starting you in these classes. It’s nice if you can go
through in order but it often doesn’t work that way.