I hear "can I go..." all day long! My 8th graders only have a 2 minute passing period so they are always asking for passes to the bathroom and to get a drink of water. I am very close to the restrooms and don't mind allowing the students to go (only one out of the room at a time) within reason. I track how often they go and stop the frequent fliers.
The killer is getting a drink. Students sometimes come directly from PE and it's hard to deny a beet red face a quenching drink of water. As an art teacher, I have a bank of sinks in my classroom. I would tell the students to turn on the water and stick their face underneath. The girls would give me a funny look and so would some of the boys. Eventually thirst won out and they would sip from the faucet. I knew there had to be a better way so I asked Google and ordered this cool contraption from Amazon. It's amazing!
Dreamfarm Tapi Fountain Rubber Tap (Colors may vary)
by Dreamfarm
Link: http://amzn.com/B004I8V8DI