This is very coincidental because I'm planning on doing this trip VFR in a few months with Cactushp. I don't know if this will help to explain the VFR side, but I'll do it anyhow . We'll file a DVFR flightplan, get airborne, call up Selfridge on 119.6, they'll give us a squawk code (and flight following) which will clear us into Canadian Airspace and when you get around the Detroit Area they'll switch us to Cleveland Center on 127.7. Once you're over Lake Erie you'll be back in US airspace and you can request cancellation of flight following and just land at Sandusky. For $20 the FBO will take you to and pick you up from Cedar Point.
You do not need to have a Radiotelephone Operators permit because the FAR states that one is required only when talking to a foreign station. Because Toronto center starts just around Sarnia and all the way over to just about south of London, you shouldn't have any problem talking to Cleveland Center. If you'd like to look at the demarcation line for the two centers take a look at the Enroute L-30 chart.
I hope you have fun, again, I haven't done this flight yet, but will be doing it soon. Maybe we'll be going on the same day as you and your student.
Also, if you have questions, look through the CAR, call AOPA or flight service.
Military Aircraft Every type from fighters to helicopters from air forces around the globe
Classic Airliners Props and jets from the good old days
Flight Decks Views from inside the cockpit
Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior
Cargo Aircraft Pictures of great freighter aircraft
Government Aircraft Aircraft flying government officials
Helicopters Our large helicopter section. Both military and civil versions
Blimps / Airships Everything from the Goodyear blimp to the Zeppelin
Night Photos Beautiful shots taken while the sun is below the horizon
Accidents Accident, incident and crash related photos
Air to Air Photos taken by airborne photographers of airborne aircraft
Special Paint Schemes Aircraft painted in beautiful and original liveries
Airport Overviews Airport overviews from the air or ground
Tails and Winglets Tail and Winglet closeups with beautiful airline logos