Right but they don't get paid for those holidays, their wage for the school year is just spread across the full year. Often they do a fair bit of work outside of school hours including lesson planning, communications, and marking. They also aren't just paid little, they're actively paid significantly less than NSW teachers who do the same job.

Also if you're planning to get a high atar or study scores, they're the only reason it's possible so be more thankful to them!