There could be a few reasons why the teacher doesn't want your son to solve problems his own way.
The teacher may be trying to teach a particular method and if your son uses a different method, he is not showing that he has learned the taught method.
The teacher may be concerned that your son needs to use the taught method on state tests at the end of the year to get full credit (or any credit).
Or the teacher may not understand how to do the problems any way other than by the method(s) being taught.
Last edited by Kai; 08/24/14 07:40 AM.