I had a strange demonstration experience today. I arrived 10 minutes early and they were running about a half hour behind so I waited for my turn. I did my lesson and about 15-20 minutes into it (it was suppose to be a half hour) the principal told me the children had to have lunch and go home. I was shocked that I didnt get to finish my lesson. Do you think it may have anything to do with the fact that the lesson didn't go 100% smoothly or that I made a spelling error on the board?