sentences:  Many after-school activities take place in the afternoons of school days, on the weekends, or during the summer, thereby helping working parents with childcare.While some after-school programs serve as a day-care facility for young children, other programs specifically target adolescents in middle and high schools—providing opportunities for children of all ages.Some proponents of these programs argue that if left unsupervised, children and adolescents may fall into undesirable activities such as sexual promiscuity, substance abuse, or gang-affiliated activity.