[Tomcat68]

I ain't the smartest man in the world but I don't think you are suppose to use a comma inbetween the words "grammar" and "and".

I'm never too sure about that either. I've had several teachers teach it each way. Some say if you have a list of 3 of more things a comma goes after each item including the item directly before and. Other teachers say to NOT put a comma on the last item before and. I think it's more of a personal decision.