I'm the principal of an alternative high school and we've done disc golf units both Fall and Spring for the last couple of years. The kids really like it but few have actually been hooked enough to really care about the flight characteristics of the discs. They usually want the coolest looking discs or their favorite color as much as anything. Now, granted, my students tend to be low on athleticism and motivation to excel, but I would advise you to be realistic that the majority of your kids will not get into the sport to the extent of caring much about the nuances of disc weights, flight numbers, etc. For the bulk of your discs, get the easiest discs to throw successfully right out of the gate. I love your idea about Leopard/Colt because that combo would be so versatile. However, if you're talking about a mixed gender general population of high school kids rather than a select group of stud athletes in a disc golf club, make sure you get 150 class DX Leopards that will give you some understability and glide with a beginner's form and arm speed. The new Champion Leopard 3's will be too heavy and overstable for many students. I think the Avair would be a good choice too (in lighter weights) if you go with a more traditional putter rather than the Colt.
If you didn't need to stick with Innova, I'd suggest the Lat 64 Diamond. Last year, I found several misprint discs on the cheap in their Frost and Opto plastic and the kids love them because they look cool and are super easy to throw. An Innova disc to consider for your less skilled beginners is a lightweight Condor (<170g)...throws a lot like a frisbee.
As for the kids who are motivated and interested enough to join your disc golf club, go for some snazzy looking Champion plastic like a Leopard, Leopard 3 or even a Mako 3.
Now that I've said all that...my 16 year old son who is really into disc golf and normally into Trillogy plastic, has played several two disc rounds this Fall/winter with a Champion Leopard 3 and an XT Colt...so take that for what it's worth...he's really into those discs right now.
Good luck with your project!