If your teen becomes secretive and doesn't want to chat even about how her way went in school, should you consider it normal? Why or why not?

There really comes a point where teens act distant, or they become secretive. It's perfectly normal behavior. What you should do is tell your teen that you will always be there for them if they need you, and that you're open to conversations with them. What you shouldn't do is snoop around and read their texts, or check their FB accounts etc. It's important to give your teen some room for privacy.