Zemke and Zemke believed 30 ideas/concepts/techniques related with adult learning/andragogy can help toward accomplishing the job as adult educators. Tenant analyzed Knowles' popular andragogical assumptions and processes, while Hartree, Jarvis, and the Davenports considered Knowles' andragogy overrated in its contribution. Not to be deterred, Knowles' published his book The Adult Learner (third edition) and Andragogy in Action, a compendium of 36 positive organizational results of andragogy. Brookfield called American andragogy an unproven theory. Taylor offered a very strong and articulate research-based process model for Knowles' andragogical implementation of four phases and four transitions into learning for self-direction in the classroom. Henschke developed an andragogical assessment inventory entitled: Modified Instructional Perspectives Inventory (MIPI), which is Cronbach Alpha validated three times for reliability, including seven factors of which ‘teacher trust of learners' is the strongest factor with 11 elements describing its dimensions. This chapter explores this.