Not only is it important to break down content into distinct 'chunks' to provide structure and coherence to a learning experience, but it essential if information overload is to be avoided. You may be surprised to learn that the human memory is a relatively frail piece of hardware. In fact, our working memory can only juggle a maximum of five new pieces of information before we get overloaded, and new knowledge gets lost in the abyss of what psychologists refer to as the Ebbinhauser Forgetting Curve. The simplest remedy to minimize retention loss is to try and avoid information overload in the first place by breaking learning content down. Furthermore, by having distinct bite-sized 'chunks' of content, learning metrics are able to pinpoint specific pain points or knowledge gaps.