This is where I was four years ago, except I had the huge advantage of training for the decathlon senior year of college.
I can't say that I ever found a training manual that really laid it all out for me for each discipline, though I did borrow a copy of the Track and Field Omnibook from my college coach. I found that useful for a basic to moderate coverage of each event.
Do you still live in the area where you went to school? If so, your number one best resource is going to talk to the coaches there, even if you never interacted much with the jumps coach (assuming you had a jumps coach).
In terms of workouts, anything that improves upon general athleticism is a plus. You can't go wrong with plyometrics (google is your friend here), and these don't have to be limited to your jumpers--distance runners will benefit as well, though they should stick to the simpler ones. Start everyone with the comically simple plyos/drills--and then advance through the season--to reduce injury risk. The jumpers should also be getting in some sprinting (and in high school, many of your jumpers will also be sprinters anyway), but for the most part they won't be doing traditional workouts like you're used to. Think short intervals with long rest.
Look up "flying 30s". These are short sprints that emphasize running smoothly at top speed and de-emphasize the importance of acceleration (since it's not as much of a priority as in sprinting). Our pole vaulters did them in college and I've generalized them to all the jumpers on my team.
I also can't recommend hill sprints enough for anyone whose job is to run fast (long jumpers, sprinters, 800 runners, etc). These should be short, 8-10 second sprints at near-maximum speed, with at least 2-3 minutes rest, focusing on good mechanics and running "relaxed but fast". The hill doesn't need to be all that steep (the one I use personally is a bridge over a set of light rail tracks). Build up to doing 8-10 over maybe 1-2 months.