The context of the following conversation is Cameron gave the class a gift after they met their reading goals for the grading period.:
Cameron says You should have seen the students faces when I announced the pizza party!.
The friend responds Aw they didn't know about it prior to that day?.
Cameron responds Nope, it was a reward for everyone meeting their reading goals for this grading period, they worked hard.
The friend responds You are a good teacher, that is such a good idea.
Cameron responds It will keep them motivated for the next grading period, which surprise, I added 4 additional books haha.
The friend responds You are a good teacher but a sneaky teacher my friend, that is brilliant!.