Or the more appropriate title - 'Hormones, Hormones, Hormones..." Now, I did not have the advantage of having a CGM with Middle School so some of my experiences may be slightly dated. If I don't reiterate it enough - CGMs are your friend (why spend the majority of time worrying about something you have little control over).
Middle School is always an interesting time for a T1D. Sometimes there is an obvious pattern for low BGs and high BGs and sometimes there isn't. A lot of the confusion is due to the vast amounts of hormones that are causing our growing bodies to burst into High BG levels without any warning rather that is when we wake up, after lunch, when the cute boy/girl looks at you, or if you are going out to recess. When you get home, depending on the homework schedule - you are suddenly dealing with all sorts of stress - parents bugging you to do your work, getting ready for dinner, getting ready for tomorrow, testing your blood sugars, making sure that your supplies are ready to use the next day. I feel that the Middle School - Junior High years were the time where I found my independence. My parents gave me a little bit of freedom, knowing that I had the support of friends and teachers to make my own decisions. If I was to have a bite of a donut while hanging out my friends - knowing that it would inevitably lead to a High BG and then it was on 'me' to fix it.
I find that sometimes parents feel as though their young T1D is not controlling their BG levels because they are simply lazy -but that is not the case. Those pre-teen/early teen years are a time period of discovering just how bad severe lows and severe highs can feel. A part of becoming independent with your Diabetes is knowing how it feels. If I were to take a bite of a donut and not correct with a bolus - I would spend the next few class periods either peeing a lot (which is not how you impress the opposite sex) or having a raging headache. There is no parent available to get you in gear so inevitably - you correct. No one likes to feel terrible and there are situations that will be presented that you that you will have to take into account. If you're low, have a plan: grab a soda, get a snack at the nurse's office, grab a glucose tab, tell your friends. If you have a high, have a plan: know where your shots are, enter the BG in your pump (if being used), go to the nurse's for assistance.
I have to admit -the nurses in my Middle School and I were pretty close. They always looked out for the T1Ds at the school. I know this isn't always the case but support is available via friends, teachers, or nursing staff.