What new lesson do jem and scout learn from their father?

They learn a lot of things from their conscientious father.

1. From Boo Radley the children learn that things (and rumors) are not always what they seem. 
2. Scout learns that she should sometimes place herself in other people's shoes because you never know what they might be going through.
3. Atticus.  Both of the children learn that "it's a sin to kill a mockingbird"--be it the songbird or innocent human beings. Scout also learns about tolerance and how

Personally i think it is a