Teagan Halbrooks
by Camila Gonzalez Sometimes teens have trouble becoming adults, but not Teagan Halbrooks. She used to watch the High School Musical movies and played with Bratz dolls. Now a senior at Lawton (Okla.) High School, Halbrooks is raising her 12-year-old sister because their mother is battling a disease. While the 17-year-old drives her sister home from school, the two of them play a game yelling out the names of whatever they see on the road. She does this to remind her sister that they can still have fun even though their mother, Randi Halbrooks, has reflexive sympathetic dystrophy syndrome (RSD).…