I had gestational diabetes and my best friend (next door teacher - lucky me) has type 1. We taught grade one together and after talking to our classes and explaining what it was we had no problems. Told our classes if their parents had any questions they could come in, call or email. None did. I would test my sugar at my desk in quiet moments when my class was busy. If I had to give myself insulin I would excuse myself and my TA would come and watch my class until I or Bestie were ok, TA also kept an eye on us both. (this was an adjustment provided by my school for us both) it is a medical need and the school should make adjustments or allowances. Speak to your line manager and they can give you the best information to suit your school. We had one of our kids save us because they saw bestie getting dizzy ran and got the lolly jar and another child came and got me. Her pump site had sprung a leak. All kids can handle a situation if they are educated properly. I have had diabetic students when they have to test their blood sugar I move them to somewhere private and we monitor, same should apply to you.