Thematic Development of Reading Texts in “English Alive” of Eleventh Grade of Senior High School Written by Tri Indaryati

English is an international language which is used by many people in this world. But in educational world, it is still hard to be used and understood by students in many schools. With English textbook, students can crash this matter due to the importance of English textbook. English textbook can help teacher to teach English and help students to study English. This research is aimed at finding what thematic development is used in reading text found in English Alive textbook. In this case, I take the data from one of English textbook. It is English Alive textbook that is published by Yudisthira Publisher. This is descriptive qualitative research. The data were analyzed as thematic development of reading texts in English Alive textbook of eleventh grade of senior high school. The reading texts that I analyzed are analytical exposition, hortatory exposition, report, narrative and spoof. Then I decide them in several clauses. And finally, I determine the thematic development. Based on the analyzing of this research, I find the dominant thematic development of this textbook; it is parallel theme. It means that this dominant thematic development considers the themes become main themes of the texts by repeating them in the next themes. However parallel theme makes readers bored to read but the writer makes this book attractive with its appearance and the story itself. So I can conclude that this English textbook; English Alive text book is good textbook and be recommended to students especially students in Kudus and teachers too because it has well-organized thematic development. From this research, I hope it will make English students, English teachers and lecturers of English Education Department of Teacher Training and Education Faculty of Muria Kudus University realizes that thematic development is crucial in English. So they should consider more about thematic development to get better writing skil