“My daughter used to be so wonderful. Now I can barely stand her and she won’t tell me anything. How can I find out what’s going on?”

“There’s a clique in my daughter’s grade that’s making her life miserable. She doesn’t want to go to school anymore. Her own supposed friends are turning on her, and she’s too afraid to do anything. What can I do?”

Welcome to the wonderful world of your daughter’s adolescence. A world in which she comes to school one day to find that her friends have suddenly decided that she no longer belongs. Or she’s teased mercilessly for wearing the wrong outfit or having the wrong friend. Or branded with a reputation she can’t shake. Or pressured into conforming so she won’t be kicked out of the group. For better or worse, your daughter’s friendships are the key to enduring adolescence—as well as the biggest threat to her well-being.