HOMEWORK and exams are more likely to cause children stress than peer pressure to be “trendy” or have a boy or girlfriend. Doing well at school topped the list of the five most common worries of five to 16-year-olds, according to research for computer firm RM. Other problems for the 266 pupils were drugs and alcohol, bullying, future education and friendships. A parallel poll of 256 parents indicated they are out of touch, more than half thought their children were most concerned about their friendships.