English is well-known as a global language used by people to communicate with other people around the world. If someone does not know English, he will get difficulties in having communication with other people that use English. Therefore, mastering English language is very important.
The fact that mastering English is very important becomes the background for the government of Indonesia to put English in the formal education curriculum. The government of Indonesia has put English as a compulsory subject since the fourth grade of elementary school. It is expected that every student will be able to master English so the student does not find any obstacles dealing with language when the student is having communication with other people from around the world.
Feez (1998) argues that enabling learners to develop the knowledge and skills which will allow them to engage with whole texts appropriate to social context is the aim of English language teaching. Because of that, the government of Indonesia is implementing the School Based Curriculum which focuses on texts both in junior and senior high school levels. In the curriculum, senior high school students are obliged to learn English through different texts which have different function based on social context. Therefore, the syllabus used in the learning and teaching activities is text-based syllabus. The genre-based approach is one example of approaches used in text-based syllabus (Feez, 1998). Some texts to be taught in senior high schools are recount, narrative, procedure, descriptive, news item, report, analytical exposition, spoof, hortatory exposition, explanation, discussion, and review (BSNP, 2006).