They used individual as opposed to authoritarian teaching methods!

 

“This enormous demand for private as opposed to public education is perhaps best illustrated by the fact that working-class parents in a number of major cities responded to the introduction of compulsory attendance regulations not by sending their children to provided state schools, as government inspectors had predicted, but by extending the length of their children’s education in private schools. Parents favoured these schools for a number of reasons:
they were small and close to home and were consequently more personal and more convenient than most publicly provided schools; they were informal and tolerant of irregular attendance and unpunctuality; no attendance registers were kept; they were not segregated according to age and sex; they used individual as opposed to authoritarian teaching methods; and, most important, they belonged to and were controlled by the local community rather than being imposed on the neighbourhood by an alien authority”