Who is not associated with the idea of micro-teaching from the following?

Micro-teaching is a scaled-down teacher-training technique in which a trainee practises one specific teaching skill in a brief lesson to a small group, then reviews the recorded performance for feedback. It was developed at Stanford University in the early 1960s, led by Dwight W. Allen with colleagues including Robert Bush; the approach was later extended internationally through supervision and training research by figures such as Keith Acheson.

Checking each name against this history:

• D. W. Allen — the Stanford educator credited with originating micro-teaching in 1963; the technique's core design is his direct contribution.

• Bush — Robert N. Bush worked alongside Allen on the original Stanford micro-teaching programme.

• Acheson — Keith Acheson's work on clinical supervision and teacher training builds directly on the micro-teaching framework.

• David Hume — an eighteenth-century Scottish philosopher known for empiricism and scepticism, active roughly two centuries before micro-teaching existed.

Three of the four names map directly onto the documented origin and development of micro-teaching, while the fourth belongs to an entirely different era and field — confirming the exclusion by elimination as well as by direct fact.

David Hume is therefore the one not associated with the idea of micro-teaching.