One comment I'd make about the posing. Not sure if you had them pose themselves or had the assistance of an instructor. If you look at photo 1 and 3 (The high kicks), these (to some) may appear to much "posed". When throwing a kick they should be looking at their foot. It would be like taking a side shot of someone on a horse jumping a fence, would you want them to be looking forward to where they are about to land, or turn their head sideways, loooking at the camera and smiling. Seems a little unnatural. As for the two I mentioned, from a parents point of view they probably wouldn't notice or care, from an instructors point of view, they may see these as odd. (They probably wouldn't use those in their advertising for instance, aiming for a more authentic look, but as for selling to the parents it would be fine) Again this comes down to preference and some would not care but would be something you might want to consider if you hadn't thought of it. Aside from that I like the shots and think if you drop the light on the background like many have mentioned that it will compete less for attention and will work quite nicely.