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2. Investigatorresource triangulation
Some different sources were asked information regarding English textbooks and their cultural content. The sources
consisted of: the head of curriculum affairs waka kurikulum, English teachers, and MGMP leaders appendix
2 and 4
3. Methodological triangulation
Methodological triangulation was completed by using some data collection method, namely: survey appendix 1 and 3,
interview appendix 2 and 4, and documentation appendix 7.
F. Unit of Analysis
Based on the data obtained from interviews and surveys, there are two textbook titles that are used in MTsN di DKI Jakarta.
Therefore, the materials used for the cultural content analysis are chosen from two series of English textbooks approved by the
Ministry of National Education MoNE of Indonesia as fulfilling the School Based Curriculum 2006 content standard. They are local
English textbooks written and edited by a group of Indonesian textbook authors. The series entitled English in Focus book 1-3
and English on Sky book 1-3. English in Focus book 1-3 is authored by Artono Wardiman, Masduki B. Jahur, and M.
Sukirman Djusma in 2008 and developed under the government fund of Puskurbuk the centre of curriculum and books. This series
is intended for grade VII, VIII and IX of Junior High School students. The government has bought the license of this book from
the authors to be distributed nationally online free of charge to download and by prints in an affordable price of IDR 11.000. It
is edited by an internal editor of a partner publisher company.
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Picture 3.1 English in Focus 1-3 Meanwhile, English on Sky book 1-3 is authored by Mukarto,
Sujatmiko, Josephine Sri Muwarni, and Widya Kiswara in 2007 and edited by two editors. Alike English in Focus, this series is
proofread by a native speaker Paul McAdam before it was published by Erlangga. This series is also intended for grade VII,
VIII, and IX of Junior High School.
English in Focus is a suggested English textbooks by the government the school can choose one title of two titles available,
the other one is Scaffolding therefore this series is used as the main textbooks buku pegangan wajib siswa. Additionally, school
can also choose to use commercial English textbooks by local publishers. English on Sky was mostly chosen as the language is
simple and easy to understand
91
.
Picture 3.2 English on Sky 1-3
91
Informal interviews with English teachers
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G. Data Analysis Method
