ABSTRACT
The chapter reviews the use of the word ‘knowledge’ in the context of this handbook, including a brief discussion of significant other usages. The review is predicated on an understanding of the use of the word ‘research’, standing for formal, or academic, research. The core discussion is about forms of knowledge from practice that are shared as an outcome of research. New knowledge generated from practice is discussed and a number of famous examples are presented in order to illustrate what new knowledge can look like in practice-based research even though these examples do not come from research. The theory of research knowledge that arises from practice is then reviewed.
