Boardwork refers to the effective classroom use of the traditional blackboard or its modern version, the whiteboard/wipeboard. In this context it includes also the flipchart and overhead projector, and now with the increasing presence of IT in the classroom, PowerPoint presentations and the like.
It is an especially important visual aid much neglected by teachers and teachers would do well to take a couple of steps backwards and take a long, objective look at their boardwork, analysing how clear and therefore effective it actually is.
Long gone are the days when teachers wrote up whole lessons on the board and students had to copy it all into their notebooks. Nowadays it's more useful as a way of pointing out individual vocabulary items, pronunciation work (including use of the International Phonetic Alphabet symbols), highlighting [word stress], checking word order, correcting mistakes. Warmers and word games such as hangman and mindmaps are especially suited to boardwork and for the latter layout and use of colour is therefore especially important.