Fall 1965: Gunn High School in Palo Alto CA... the school district's fist 'computer' class (Perhaps one of the first HS classes anywhere?)
They only had a keypunch machine at the school... and at the first class admitted they were still looking for a computer to use, as the District had quashed plans to allow their own in-house computer to be used by [gasp] students!
Next class, they announced they had FOUND a computer very nearby:
The Burroughs B5500 mainframe at SLAC!!! (Stanford Linear Accelerator Center).
No problem for students there!!! We ran our class exercises in B5500 ALGOL.