Greensville Public School, Ontario, Canada. From the history section of the school’s website:
In 1982, the Wentworth County Board of Education decided to purchase three Commodore 64’s for each school. Greensville’s P.T.O. matched this with three more machines. The three board machines worked with five and a quarter inch disks and the other three with data sets which were basically tape recorders. The tape drives were always losing material and it was very frustrating. Fortunately, they were replaced by more disk drives the following year.
In June 1982, the first computer lab was set up in the old principal’s office. This entailed putting in a wall and extra electric wiring. During September and October, the computer room was out of bounds until everything was checked. This meant the computers had to be disassembled each night and stored in the computer room and then reassembled the next morning in the classroom next to the computer room.
What are they playing?
2 Warps to Neptune 
Right off the top, I’d say River Raid…but I’m not too sure. It was released in 1982, though. Hmm.
I love the “Our Computer Room” signage. Super dated. Nobody would even say that these days. lol
The photo could have been taken after ’82, actually. It’s not captioned in the article. I guessed from context.
River Raid is a really good guess. Screenshots on Google look right.
I have one of those locking cases for my C64. The PS fits inside with the monitor on top. Solidly built.