The document discusses the process of formative evaluation of instructional materials and instructor-led instruction. It describes conducting evaluations in three phases - one-to-one, small group, and field trial - to identify issues, improve the instruction, and determine effectiveness. The goal is to evaluate and revise materials based on learner performance and feedback before full implementation, in order to ensure the instruction is clear, impactful and feasible for its intended audience. Specialists may provide input during development, and the evaluations involve collecting various data on learner comprehension, reactions, and skill demonstration.