Using Cunningworth’s Theory to Evaluate the Libyan Second Secondary English Textbooks

The main objective of this study is to evaluate English language textbooks in the Libyan second secondary school. In this study, the researcher used a document analysis method. The data of this research were taken from an English textbook which is 21st century English for Libya literary department of Libyan secondary 2 textbooks. Cunningsworth theory was the primary methodological tool employed by the researcher in this study. The English Textbook of The Libyan Second Secondary School’s strengths is using the criteria of objectives and approaches, design and organization criteria, and the skill criterion. And the weakness of The English Textbook of The Libyan Second Secondary School is in terms of Language Content. The overall score of the fulfillment of the suitability of the textbook was 106 points for the evaluation of the Language Textbook Of The Libyan Second Secondary Textbook based on Cunningsworth's Theory. The fulfillment scores were on average 77 percent good. As a result, the Libyan Second Secondary School English Textbook was adequate. Suggestions on the Importance of English in Modern-Day Libya is that the distribution of both facilities and facilities, access to being actively involved in speaking English is one solution.