Gagné pioneered the science of instruction during WWII for the air force with pilot training. Later he went on to develop a series of studies and works that helped codify what is now considered to be 'good instruction.'
"Nine Events of Instruction".
Gain attention
Inform learner of objectives
Stimulate recall of prior learning
Present stimulus material
Provide learner guidance
Elicit performance
Provide feedback
Assess performance
Enhance retention transfer