At the moment i am teaching my cat to jump through a hoop. I have a plastic hoop and i hold it upright and hold a treat. I move the treat through the hoop and the cat follows. Once she is ALL the way through i give her the treat while saying "jump". After she gets the hang of it i move it about an inch above the floor and repeat the whole process. Eventually you will get your cat to jump through it when it is about a foot off the ground.
/\___/\
(=O_O=)