@Edent one per classroom, wow. When I started secondary we had one for the whole school (CBM PET), and by the time I left we had three (BBC B and two BBC A iirc). Well, technically there were probably another three still, the original CBM PET and another and somewhere a Spectrum that I don't think ever got used. Shortly after I left one of the teachers grabbed a job lot of MSX for a computer room (HCC didn't want them so the school could get them cheap). Different times!