The Readability Level of English Textbook Entitled ”Bahasa Inggris” for Eleventh Grade 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
eleventh grade of Senior High School of 2017 revised edition. This study is
categorized as a mixed method reseach which used the embedded design. It means
that combines both of qualitative and quantitative approach in one study. The data
were collected by using document analysis Flesch Reading Ease formula and
Flesch Reading Ease Score were used as the instruments of this study to measure
the readability level of reading texts in Bahasa Inggris textbook of 2017 revised
edition textbook. The result of Flesch Reading Ease formula calculation was one
text is in the Easy level; two reading texts are in the Fairly Easy level; one text is
in the Standard level; four texts are in Fairly Difficult level; and two reading texts
are in the Difficult level. The findings of this study showed that from ten reading
texts in Bahasa Inggris textbook of 2017 revised edition only four reading texts
were readable for the eleventh grade students of Senior High School. They were
which in Fairly Difficult level with score ranged from fifty to sixty.