Not sure whether this would help as I don't have individual wait times but:
One 8 hour visit to MK with lunch break: managed to do: Carousel of Progress, Pooh, Small World, Haunted Mansion, Space Mountain, Cinderella's Carousel, Buzz, River Boat.
One 8 hour visit to Epcot with lunch break (ca. 2000): managed to do: Yuletide fantasy (extra cost tour), Tapestry of dreams, Candlelight Processional, Millenium Village, Illuminations, Innoventions, Body Wars.
One 10 hour visit to Universal (both parks) with lunch break: managed to do: Hanna Barbera(?), Alfred Hitchcock, Kongfrontation, Caro-Seuss-el, Dinosaur exhibit, Poseidon, Accelatron, Twister, Seuss Circus.
I don't walk all that fast and often pause to look at scenery.
I'll try to dig up some other diaries of this kind I kept for some visits.
Related math topics:
On a few visits I watched as rides boarded and counted the number of riders per minute or per five minutes or whatever. From this I could estimate how many riders the ride can handle. Do you have an upcoming trip to Disney before your Math Fair project is due?
How about ticket buying strategies? Lots of math needed here! I dare say this would make a more interesting presentation to your classroom audience (or passers by at a fair booth).
For example: Under what circumstances should you not buy and use non-expiration tickets and why?
(You will probably find enough material on this subject without having to go into trading up of tickets where there are not enough equations and too many unknowns.)
I rarely get into a ride line if I think the wait will be more than 45 minutes, often I pass up that ride if I think the wait will be more than 30 minutes.
Disney hints:
http://members.aol.com/ajaynejr/dispass.htm