Community-based Mentoring is the traditional Big Brothers Big Sisters relationship. It happens after school or on the weekend. It’s all about the volunteer and young person spending one-on-one time together doing things they both enjoy - a few hours, a couple of times a month.
Mentors go to the school once a week and take the young person out of class for an hour. Typically it is the same time each week. Most schools prefer it to be either late morning or in the afternoon so that the young person doesn't miss core subjects which are done first thing in the morning.