Floating down to Camelot

I think the rationale behind it is the belief that children need to have an overview of British history done in order, so events make sense, rather than dipping in and out - doing Romans one term, Tudors the next, then World War 2, and ending up - allegedly - with no conception of how they all fit together. Although I'd have thought that a simple timeline on the classroom wall could have dealt with any confusion that resulted. But what do I know?