نص أصلي - انجليزي - Learning with London as the classroom

L.B. and his sister L. have never attended regular school and don't have a formal timetable. The whole of London and beyond is their classroom. They spend as much as two-thirds of their time on activities outside the home. And they don't do anything unless they really want to. None of the activities is compusory; everything is chosen by the children themselves.