At school in Sussex in the 1950s------Well,like so many others on this thread (UK catters ),I guess it was The Ash Grove,John Peel,a ghastly song called "Some folks like to do",the lyrics of which we altered to something risque (for us)..The Minstrel Boy,Westering Home,Skye Boat Song,Mairie's Wedding,Poor Old Joe,and the splendidly politically-incorrect "Johnny Come Down to Hilo ".All sung,of course,to the accompaniment of a seen-better-days piano played by a pale,earnest,boring music-teacher.No mention was ever made of any other kind of instrument,of course,so we all assumed that "Folk" singers must necessarily transport pianos about the place with them.