I'm strangely proud of this. Maybe it's because I'm a visual learner, but I thought this might help Charlotte's teacher. She can stick it on the wall, or someplace easy to reference. I'm going to color it in with red, yellow and green according to the bg numbers. (too lazy to figure out how to do that on the computer)
ETA: The teacher won't be doing any blood sugar checks herself. Charlotte will go to the nurse for that. But she will have her Dex on that the teacher can check at certain times of the day.