This publication covers many topics: Characteristics of adult learners; 4 principles for teaching adults; and questions for inviting participation.
Regents of the University of Minnesota (2015). Adults as Learners: Effective Teaching Strategies: [Workforce Solutions Conference]. University of Minnesota. Retrieved from https://www.leadingagemn.org/assets/docs/15_Workforce_103_CreatingEffectiveOrientationPrograms-CRasmussen.pdf