Here's a few pictures from a school I taught at over summer, mainly of one student performing Acrobatics/gymnastics.

as I'm trying to improve my photography any feedback would be awesome.

I've also given my own critisisms below some of the photos so opinions on wether people agree with that would also be great

pic 1
I think the focus on the hand isn't quite crisp enough and the head is cropped too tightly

pic 2
He doesn't really stand out from the background well enough for my liking

pic 3
Note the subtle irony...

pic 4
Again he doesn't really stand out from the background well enough

pic 5

pic 6
shutter speed a little slow

pic 7
I think a greater depth of field was needed or I should have focused on the hand

pic 8

Finally a couple from SA
http://www.flickr.com/photos/30810544@N04/sets/72157607567064046/