I've only had one experience, and I didn't get paid for PD days, stats, Christmas, March break or the summer and she had a different schedule every week so I was holding a ft spot open when she was only using 2 days some weeks. When I started standing up for my need for a more stable income, she left (one month after returning for the summer, after I held her spot for no charge). I'm never doing that again. Teachers will have to compromise. I'm fairly sure they don't go without income for those days, so I'm going to insist that I will not either.