Not all yearbooks need to be filled with portraits.
I actually believe that the candid pictures are the ones that make you have better memories than the ones you posed for.
This series was taken over several days that I spent inside the classroom with the kids until I became a fly on the wall so they could go on with their routine.
That's the only way you can capture someone's personality in a picture. With a lot of patience until they let their guard down.
Then you can have authentic memories, which I'm sure they will all appreciate.