When the school year starts, your teen-ager might be worried about everything from math class to the latest fashions. Your fledgling first-grader, meanwhile, may be anxious about making friends and just finding the restroom. Two weeks before school begins, get your child back in the habit of going to bed, rising and eating meals at set times. All youngsters need time to adjust after summer activities. Make a special trip to the store to buy school supplies and a new outfit for the first day. On a calendar, start counting down the days until school begins. Drive by the school and point it out to your child. On another day, take the child to the school. Play on the playground and look in classrooms and the lunchroom. If the child will walk to school, walk the route with him or her at least one morning or afternoon. Walk to the bus stop if the youngster will ride the bus. Go to the school’s open house so the youngster can meet the teacher and other students. Familiar faces are reassuring on the first day. Plan a special back-to-school dinner with your child’s help. Rise early, and prepare a favorite breakfast on the first day of school.