The key questions in the book

The key questions that the author is addressing are:

If all this brain development is inevitable, do adults make a difference in the lives of teenagers?

Why should we worry about how teenagers affect us?

When I work with teenagers why do I get so worked up? 

Why do I act just like them sometimes?

Why do I feel so out of control on occasion?

Do we matter at all?What does it look like when we get affected, or infected by them?