Donald Hebb is best known for his theory of "Hebbian learning," which posits that when two neurons are repeatedly activated together, the connection between them strengthens. This idea laid the foundation for understanding how neural pathways are formed in the brain and how learning occurs. Hebb's theory has had a significant impact on the fields of neuroscience and psychology.

It is a scientific theory

heliocentric theory, the theory of evolution, relativity theory

Theory of law. Theory of the climate. Theory of lax. Theory of vandals. Newtons's theory of mass.

Theory-practice-theory take existing theory in education, apply to distance learning, develop new theory

Practice-research-theory see what is happening in distance learning, submit to research, develop theory from results

Theory-theory-research/practice build on an initial theory to develop a second theory, then apply and test it