... roles and types of materials in language teaching and learning. and presents major issues in materials evaluation including definitions of materials evaluation, purposes for materials evaluation, ... constraints of a particular situation. 1.2. Materials Evaluation 1.2.1. Definitions of Materials Evaluation There are many ways of defining evaluation. According to Hutchinson and Waters (1987, ... materials evaluation, types of materials evaluation, materials evaluators, models for materials evaluation, criteria for materials evaluation, as well as material adaptation. Chapter two focuses on...