If your looking to get them higher do V ups. Also do a strattle and put one had on each side of your right leg lift your leg up and bounce it 5 times you should feel it really bad in your thigh. repeat with your other leg. These should help.

Have you tried weight training? It takes stronger legs to jump higher. And pay close attention to technique for whatever jump your trying. Better technique will always get you higher.

Thanks guys

try using the little weights that are for your legs.
put them on then do ur jumps. do it for awhile by the timeyour
done with them your jumps will be higher thats what my friend did.

I would contact www.youthfitnessmag.com they are looking for articles to write about. Ask them to write about how to jump higher. They are pretty quick to respond.

Just think that you can do it and you will!

just keep trying your best

jusp practice plain straight jumps to get ur body stronger and strech alot