Non-compete

I was checking some posts over in the Knitting forum, and some of the posters mentioned that we signed a non-compete. When I started the program with CYC, I was told that I could teach anywhere. I specifically asked my manager if there was a non-compete clause, and she said no. I was not asked to sign a non-compete clause, nor did I.

Is this company policy? The non-compete? I was under the impression that there were other teachers here in to forum who teach elsewhere as well.