Just say it's a girl thing and he'll find you a girl teacher.
If you need to tell your teacher that you have your period all you do is take them to one side and say 'Sir/Miss I have my period' - it's that simple.
you tell him/she your having a problem and he/she will ask what say im having my period.
walk up to the teacher and tell him/her
When I was in my primary school, I had a friend who did tell our teacher she had started her periods and it was all OK. But we had a very small school and our teacher was really nice.
If you bled through your pants and it is a girl teacher go up at the end of class and quietly tell them. If its a male teacher then go to the bathroom. If you just want to tell your teacher for the heck of it that is not a good idea
Blood will appear on your underwear
tell them youve got knits
if he tells u to do something then do what are teacher told us to do,just tell him that your on your period
You can tell your gym teacher that are having your period, or if you are uncomfortable saying that you can say you need to go to the nurse. You can tell the nurse and she will help you. If you don't want to go to the nurse, just tell the teacher that you have cramps and it hurts when you move and can you sit out for a bit?
tell your gym teacher
Ask to speak to your Mum in private as you have something to tell her.
[insert parent name here], I started my period.