Talk to your teachers-It doesn't matter if you're a freshman or a senior, you must tell your teachers what is going on. You must explain to the teacher how you act when your blood sugar is low or high, you must also explain that you may need to eat or drink something while in class. I remember getting yelled at a few times because I'd have a juice box in class and the teacher thought I was doing so because I wanted to piss her off. I never told her that I was a living with diabetes, she just thought I was a kid trying to be cool and break the rules. Also give your teachers some kind of candy or juice box that they can keep in their desk in case you don't have something on you to fix a low.
Tell your nurse what kind of person you are-The nurse is a major person in a diabetic high schoolers life. I was always told I needed to go to the nurse to test or if I was low, I never did so. Not everyone will agree with this but you know your body better than anyone, tell the nurse how you plan to go about each day while at school. Tell the nurse what your testing schedule is like, talk to the nurse about being able to test in class if you can. Personally I like to test whenever and wherever, I would rather test in the classroom or bathroom, why should I go to the nurse and miss five minutes of class?
Tell friends about your diabetes-I never thought diabetes was cool when I was high school. I hid my disease and never told anyone about it. Don't make that mistake!! Tell your friends about your personality when your low or high, tell them that if your over their house and reject food that it's nothing personal just that it won't help your blood sugar. Just because all of your friends are eating ice cream doesn't mean you have to. If you want ice cream make sure you take the proper steps to cover it with insulin. Being honest with boyfriends or girlfriends is a must as well. The more information they have the better the relationship will be, if you easily get mad when you're low tell them this before he or she cracks their knuckles and you get all pissed off and mad at them because your low. Trust me it helps a lot, I would have avoided a lot of minor high school fights with my girlfriend if I told her I have a very short temper when I'm low.
Test before practice or before driving-This is self explanatory but before any athletic practice test your blood sugar. A coach will understand if you need to eat before going out to practice. Make sure the coaches know what is going on, if your 80 before practice tell your coach, "Coach i was just 80, I ate a power bar and had a juice, I have Gatorade and will be all set to practice." Driving with diabetes is not a joke, I just recently purchased a machine to have for my car. Get in the routine of checking your blood sugar before you start the car, it sounds like a pain in the butt but it will save your life. Make it a routine, test your blood sugar, put your seat belt on, start the car and then drive. Like anything, the more you do it the easier it is. Also always have some kind of sugary food or candy in the car, a tub of glucose tabs is amazing, the heat and cold doesn't effect them.
I have heard great stories about people living with diabetes in high school and I have heard from people that say high school was awful. High school is what you make it, if you hide your diabetes from everyone in high school you will not enjoy it. If you are open and honest with everyone you will have the time of your life. It will take a lot of work on your part but with anything if you put the work in you will be successful!!