nickels worth of advice
Ice, ice and I don't mean Baby. Make sure you are taking care of those knees before and after class, Icing them is probably the best thing, for short term relief, also I would consider spending the money and getting Knee pads, you will probably want to get the foam neoprene type, and if you can get the ones that are open in the back as the seem as if they would be more comfortable. ATM sells them in their classified section. I personnally do not own a pair, but I imagine someone out there might...