you can try these:

1. put 10 high-back chairs in two lanes about 1-1.5 mtrs apart (rows & columns).
2. connect the chairs with a garter making a zigzag.
3. jump over the garter until you get thru the zigzag then back..

note: adjust the height of the garter and distance & number of chairs as you are able to leap higher.

i guess this is old school but worked fine, among other exercises, during our volleyball playing days at school and i tell you, i was able to dunk the basketball with two hands and i'm not even near six feet tall.

but that was history kasi ngayon ga-toothpick na lang taas ng talon ko