I've had two done and usually the next day , you should be able to go to school ! Check with your Doctor and wear flip flops or something to let air in . I took my bandages off the next day or so , but you want to keep it clean . Just have your Doctor write you a note about what you can or can't do at school ! Don't worry , it only takes a short time and you won't feel anything ! Good Luck !
My brother has had three of those done and he stayed home one day, but the doctor should let you know and tell you exactly how many days he'll put you off for. And then he might not, but usually it's one day just depends on how bad the toenail was like in depth and all that. GOOD LUCK!