Saudi Arabian Ministry of Education is seeking for the best English language textbook to be taught in schools in order to develop the Saudi education in the future. To choose the most beneficial one, frameworks or tools were designed to analyze and to evaluate a unit of a textbook in Saudi Arabia based on standard criteria. These standard criteria were concentrated on vocabulary by setting two required conditions to be applied in the analysis of textbook. Firstly, frequency and learnability are the main concentrations to examine vocabulary. Secondly, it is to apply the four strands in teaching and learning vocabulary items. To be able to extract the criteria for analyzing and evaluating and the unit of the textbook, this major research paper is built on two important concepts: Nation's four strands in teaching and learning vocabulary through pedagogical approaches and vocabulary learnability and Lewis' theories in lexical approach and syllabus design. The results were (1) the vocabulary is infrequent but learnable but with insufficient exercises of the four strands, (2) two of the four strands have heavily activities whereas other two strands have few activities, and (3) no consistency to recycle all vocabulary to retain the words and their meanings. There are some limitations regarding this paper. This paper needs to expand the study by observing the teacher and the students through making focus-group and interview both parties to evaluate the textbook and what kind of recommendations should address the publisher to improve the textbook.