Autonomy

Autonomy is synonymous with independence and leadership. How does one explain to a 4 year old, who has always been pretty independent, how to be herself and not follow someone elses lead? Sara has been in trouble twice this week and has the teacher astonished at her behavior. Here it is a Thursday and I am just finding out about it. Does anyone have suggestions?? I certainly don't know what to do except reinforce good behavior and good choices. AGHHH