My introduction to folk song and dance was in Junior School singing lessons. The songs were simple, easy to learn the tunes, and everyone could have a go!
Very few children currently learn how to sing and when they do sing it is more akin to a bellow.
However, as commented above, the teachers really ought to know how to sing properly themselves before attmpting to teach others. This where E F D S S could be useful. Happily we have today moved away from the time when that society proclaimed that folk songs should be sung in an operatic manner!
Colyn.