Rather than studying separate academic subjects, a theme is studied for any given length of time, be it a week, three months or longer. Maths, English and so on are then studied as part of and in the context of the current theme. In common with many other Education philosophies, there are no boundaries between each subject. For example, in studying Ancient Greece, Maths and Science might be studied by examining the work of Ancient Greek scientific discoveries and theories, History would pervade the entire theme, Geography might be included by looking at the extent of the Greek empire and so on. Either student or parent can initiate a topic for study and it can be as indepth as the family choose. Unit Studies can be bought “off the shelf” or home-made.