THE READABILITY LEVEL OF READING TEXTS IN "BAHASA INGGRIS WORK IN PROGRESS" ENGLISH TEXTBOOK ON GRADE 10 AT SMAN 1 MEDAN

This study aimed to determine the readability level of reading texts in the "Bahasa Inggris" textbook, published by the Ministry of Education and Culture for the tenth grade of Senior High School, 2020 first edition. It was categorized as descriptive qualitative research. Data were collected using document analysis,with the Flesch Reading Ease formula and Flesch Reading Ease Score employed as instruments to measure the readability level of the texts. From analyzing the data based the reading texts in the "Bahasa Inggris:Work In Progress" textbook using the Flesch Reading Ease Formula, the researcher discovered that the majority of these texts are not readable for tenth-grade students in senior high
school. Specifically, the findings revealed that out of the fifteen reading texts, one was categorized as Very Easy, the score of this text is 94.15 and is intended to be read by 5th-grade students. One as Easy, the score of this text is 88,03 and is intended to be read by 6th-grade students. One as Fairly Easy, the score of this text is 72,2 and is intended to be read by 7th-grade students, three as Standard
with score of these texts are 69,8, 69,235 and 66,235, intended to be read by 8th – 9th grade students. Three as Fairly Difficult with the score of these text are 60,43,
55,438 and 52 intended to be read by 10th – 12th grade students, and six as Difficult with the score of this text are 50,635, 46,6, 45,6, 42,1, 31,435 and 31,4 intended to be read by college students.. This indicates that only three out of the fifteen texts are suitable for tenth-grade students, falling under the Fairly Difficult level of readability.