[header] How to be one of the best looking girls in your class [title] Care about your hygiene. [step] Take a shower to wash your body every day. Use a matching shower gel and body lotion, and exfoliate weekly. 
Brush your teeth and tongue 2-3 times a day with whitening toothpaste, use floss and possibly mouthwash. However, if you have marks on your teeth from braces, go and see the dentist to see what can be done.