... materials evaluation, purposes for materials evaluation, types of materials evaluation, materials evaluators, models for materials evaluation, criteria for materials evaluation, ... materials evaluation: definitions of materials evaluation, purposes of materials evaluation, types of materials evaluation, materials evaluators, models for materials 15 evaluation ... Waters (1987).91.2.5.1. Evaluation by Ellis (1997)This is a micro- evaluation. In this model, Ellis suggests the practice of a detailed empirical evaluation and focuses on evaluation at the task...