Kendall, leaping ability (vertical) in the long jump is determined primarily by eccentric strength and tendon stiffness. The best way to increase eccentric strength is through extremely high force training, but your shins won’t handle most of it now. Instead, I would do two things:
1) I would do what I could now via high load lifting (singles at ~90% 1RM) and reactive lifting (with roughly 50% 1RM and 3-5 reps). These will allow you to build up eccentric and connective tissue strength without taxing your shins. NOTE: This type of training should not be implemented in season if you aren’t doing it already. It’s also very important to watch the overall volume of such intense work.
2) I would work on fixing it so that you are capable of handling plyometrics without shin pain. This, however, is tricky. In order to do this, we need to figure out where you’re at currently. Do sprints cause shin pain? What is your height and weight? What is your background with sports? What is your background with plyometrics? The sooner you get back to me, the sooner I’ll be able to help with a plan of action.
EDIT: Also, if you just threw plyometrics in on top of your current workload then it’s no surprise you got shin splints. Perhaps you’re just overworking your lower legs.