Teaching your daughter affirmations can be an incredibly powerful tool for developing her self-confidence. Oftentimes, girls are complimented on their appearance and not on their abilities. Instead of telling a girl that you love her hair or dress, tell her that you love other things about her personality or abilities. Teach her to affirm herself and her confidence will take her far. Here's a list of affirmations to teach your middle school girl. Have her repeat these in the mirror or when she wakes up in the morning for a little pep talk.