The Faulkes Telescope South (FTS), Siding Spring, NSW, Australia
The Falkes Telescope North (FTN), Haleakala, Hawaii, USA
Las Cumbres Observatory
LCO has a number of professional telescopes in prime locations around the world. Most of the time, they are used by researchers doing science, but also are provide blocks of free time for STEM education, usually during twilight.
I was lucky enough to meet Errol Simpson, a UK physics teacher who suggested a collaboration using the twin 2m telescopes at Haleakala Hawaii and Siding Spring in Australia.
Faulkes Telescope North (FTN) Haleakala, Hawaii
Faulkes Telescope South (FTS) Siding Spring, NSW, Australia