The Readability Level of Reading Texts in Bahasa Inggris Textbook (A Descriptive Study of an English Textbook for the Tenth Grade Students of Senior High School)

This study was aimed to find the readability level of reading texts in Bahasa Inggris textbook published by the Ministry of Education and culture for the tenth grade students of Senior high School of 2017 revised edition. This study employed qualitative method with a descriptive study as the research design. Flesch's Reading Ease (FRE) formula and Cloze Test was used as the instruments of this study to measure the readability level of reading texts in Bahasa Inggris textbook published by the Ministry of Education and culture for the tenth grade students of Senior high School of 2017 revised edition. The result of Flesch's Reading Ease formula were one text was in the Easy level, four reading texts were in the Fairly Easy level, five texts were in Fairly Difficult level, and four reading texts were in the Difficult level. It means that from fourteen reading texts in Bahasa Inggris textbook of 2017 revised edition there were only five appropriate reading texts for the tenth grade students of Senior High School. They were which in the Fairly Difficult level with score ranged from fifty to sixty. Furthermore, those five appropriate reading texts based on the Flesch's Reading Ease formula calculation were made the Cloze Test and given to the tenth grade students of SMA PGRI 3 Jakarta. The results from the 50% sample of the population taken randomly showed that those five reading texts were in the Instructional Level which is the Cloze Test's ideal comprehension level. These results obtained from the two instruments used in this study confirmed that the five reading texts were indeed appropriate for the tenth grade students of Senior High School, especially of SMA PGRI 3 Jakarta