Unlike child-centered programs, teacher-directed preschools stress academics, usually taught by one adult to the entire group. The curriculum includes learning the names of letters, numbers, shapes, and colors according to a set timetable; every child naps, snacks, and goes to the bathroom on schedule as well. Children are taught to sit quietly and listen to the teacher. Praise and other reinforcements are given for good behavior, and time-outs (brief separation from activities) are imposed to punish misbehavior. As a result, children may assimilate into the elementary school system more quickly and be better prepared for academia coming from this environment. However, creativity and problem-solving skills may lag behind children coming from child-centered programs.