Plain English Meaning
The thinking behind why teaching tools like diagrams, models, videos, and handouts actually work. They help students learn because the brain takes in information better when it is shown, not just told.
Full Definition
The body of research and reasoning that explains why and how instructional aids — visual, auditory, or tactile materials used alongside teaching — improve a student's ability to receive, understand, and retain information. It holds that people learn faster and remember more when ideas are presented through more than one sense, when abstract concepts are made concrete, and when complex material is organized in a way the brain can process in steps.
Context Anchor
You encounter this in aviation instructor training when planning lessons, building presentations, or deciding what tools will best help a student understand a flight or ground topic.