Purposes
What material was for, rather than what format it happens to be in. A drill chart is a document, a method book is a folio, and a clinic recording is video, but a teacher looking for any of them is asking the same question.
What material was for, rather than what format it happens to be in. A drill chart is a document, a method book is a folio, and a clinic recording is video, but a teacher looking for any of them is asking the same question.