1. The job of teaching a child morality was deemed to belong to family and church.
2. At some point, however, the progressives in education decided it was the job of the schools to teach morality - their morality, not what the parents of the child in question might consider to be proper morality.
1. That's kind of a blanket statement. There were certainly strong initiatives to teach manners, values, and patriotism if 1950s health films are to be blieved.
2. Maybe a better idea for you to provide examples of morality that was/wasn't taught in the "good old days" vs today.
I don't think things have changed very much, in terms of social values being assumed as "good" and being taught. But maybe the problem is that we haven't considered "dissent" enough.
A friend of mine grew up in the 1950s and proclaimed himself an Athiest when very young. After a fight with the school, he was permitted to say nothing during Lord's Prayer ( in a public school mind you ). But they had to fight.