Well, now that I'm a Gr. 1 teacher, you can scratch that. I barely have time to drink water, but when I do, I must hold it in and do the squeezy dance for a long while. Some days, I only manage to fit in a potty break at the end of the day (that's around 3:00 p.m. after all the kidlings have been safely dismissed into trusted hands). Miraculously (and I do consider it a miracle), I haven't wet myself yet, and I'm also developing supernaturally strong muscles in my nether regions.
Of course, there have been a few close calls and rushed power-walks to the staff washrooms, but if being in Gr. 1 has taught me anything, it's the ability to hold it in.
So yay for Gr. 1! :)