

When I was a kid my primary school did but my secondary schools didn’t, though they did have offices with phones in scattered throughout the campus so a phone was never far away.
That said, up until a couple years ago I worked in schools IT and whoever we were doing a network refit schools would always spec a couple of points in each classroom for a VOIP handset. Most could only make internal calls though.
Have you heard of our Lord and Saviour, Jellyfin?