Hi, Lissakay ~
Oh, I can
SO relate to your description of a day in the life of a teacher...for years I referred to myself as "The Bionic Bladder."
I used to restrict my liquid intake because like you, there was
NO WAY I could run to the sandbox during the day.
I taught dyslexic children in a non-graded school and some of my students had overlays of other learning differences, it was
impossible to leave them alone.
As our NikkiNix and 24 K have written, it is important to eat each of your meals, to provide your body with all the needed nutrition. Even if you must eat your last meal under the sheets just as you are about to turn off the bedside lamp, go ahead. Your body will use every morsel and every Medifast macronutrient.
Here's what I'd suggest...have that shake or oatmeal for breakfast just like you're doing now.
IF possible, cut a bar into a few small pieces and put it in a snack-size Zip Lock baggy and keep it in your desk or inside the cover of your plan book. As you are able, slip out a small hunk. Can you be sneaky and slip a small hunky into the corner of your mouth without the kids ever the wiser?
Try to have a sip of water here and there, as you are able. If you can't, ya can't.
At 2 PM (or sooner, if your day allows) have your next Medifast meal. If you have to have a double shake, then do so. It is just best to have your meals singly but if it must be a double, then so be it. Begin your water then, too.
The purpose for multiple smaller meals is to keep the glycemic levels balanced and regulated.
This might work out for you:
7 AM Medimeal #1
2 PM Medimeal #2
4 PM Medimeal #3
6 PM Lean 'n Greenie
8 PM Medimeal #4
10 PM Medimeal # 5
When I was teaching I never ate breakfast, if I was lucky I may have been able to have a quick bite at the 10:20 AM recess - usually it was a candy bar...then nothing until after 2:30 and it was a stack or two of Ritz crackers, sugary apple juice then a HUMONGOUS carbolicious supper after 7 PM and/or micro popcorn drenched in a gazillion calories of butter at 11 PM.
I drank nothing except that bottle of juice or a cup of coffee. I now know I was constantly dehydrated. (Pardon moi, but this is the truth: I rarely whizzed and it was highly concentrated when I did...)
If you HAVE to do the double, do it. If possible mix a double shake, put it in an opaque container with a straw (so the kids and nosey staff don't know what's going on) and sippa sippa when you are able to sneak it in and then begin the water as soon as you are able. Weekends try to incorporate more water throughout the day.
The potty trips become more manageable after a few days/weeks. If you're not accustomed to drinkage, the trips seem insurmountable at first - it makes ya think about investing your 401k in Kimberly Clark paper products and 1000 flushes toidy tablets!
You can do it, lissakay, yes you can!