When I was in elementary school, we had a class called Music, in which we learned synthetic children's songs of no distinction whatever, but the process by which we learned them may deserve imitation. They were on 78-rpm records that had served for many years, and the phonograph needle may even have been wooden (to save steel for the war effort). The teacher would play a song over & over, and the pupils would strain to hear the words. If you could guess a few, you raised your hand, and the teacher would write them on the blackboard. That, of course, would give a clue to the neighboring words. Thus, by the work of many hands, a complete text was assembled, and by that time everybody knew the song & could sing it.