Micro teaching was first adopted at Stanford University by:

Concept: Microteaching is a scaled-down, controlled teacher-training technique in which a trainee teaches a brief lesson to a small group of learners, concentrating on one specific teaching skill at a time, and immediately receives feedback so that skill can be practised again and refined.

Application: This technique was introduced by Dwight W. Allen at Stanford University in the early 1960s, as part of the Stanford Teacher Education Program. It gave student teachers a low-risk way to practise and master discrete classroom skills in short, supervised sessions before handling a full-length class.

Cross-check: none of the remaining names originated this Stanford program:

• Stephen M. Corey is known for promoting action research as a way for teachers to study and improve their own classroom practice, not for originating microteaching.

• John Dewey is a founding figure of progressive, experiential education ("learning by doing") from the early 20th century, well before the Stanford microteaching program began.

• Arthur Cunningham is not connected with the origin of the microteaching technique at Stanford.

So the technique traces back to Dwight W. Allen at Stanford University.