The document outlines a scheme for evaluating English as a Second Language (ESL) textbooks based on 4 assumptions: that the textbook uses up-to-date teaching methods, provides guidance for non-native English speaking teachers, meets the needs of language learners, and considers the socio-cultural environment. It then provides more details on each assumption and proposes a checklist for evaluating textbook items like grammar, vocabulary, reading, writing, and technical elements. The document emphasizes that the evaluation criteria can be adapted based on the educational level and curriculum objectives.