Well behaved
Definition 1 of 1
Pro Tip 1/3Expectation Match
Use 'well behaved' when someone acts as expected in social or formal situations. 
Even at the lively party, the well behaved teenagers respected the house rules.
Pro Tip 2/3Cultural Nuance
'Well behaved' can imply different behaviors according to different cultural standards. 
In some cultures, well behaved children greet adults with a handshake.
Pro Tip 3/3Positive Connotation
It's a compliment suggesting respect for rules and good manners. 
Martha is well behaved; she always listens attentively and waits her turn to speak.