To alleviate the issue of having students ask to go to the bathroom too frequently, I created a bathroom pass. Each student received 4 bathroom passes at the beginning of each of the six weeks. Once they run out, they are no longer allowed to go for that six weeks.
I printed the passes on different colors each six weeks as well so they had to star over and couldn't hoard them or print their own.
The file is a word document, so it can be edited as needed. There are 8 passes on each page. I would print them and then just cut the paper in half. If students lost their passes, they would not receive anymore.