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5 To provide an evaluation and remedial teaching program suitable and
useful for both teacher and students; and 6
To present exercise and practical tasks. From the illustration above, the writer conclude that generally the function
of textbook is to help the teacher explains the materials and to make the students become easier in understanding the material given.
2.3 Theoretical Framework
In theoretical framework, the writer uses some theories to analyze the data. It comprised some theories about systemic functional linguistics, genre, and
discourse.
2.3.1 Systemic Functional Linguistics
In systemic functional linguistics, language is functional, that is, language is the way of it is because of the meaning it makes. The theory suggests that
resources available within the systemic of discourse, grammar, and vocabulary are utilized in specific ways to make specific meanings. Systemic functional
linguistics theory is a theory of language in context in which it is used. Thus, different purposes for using language and different contexts result in different
language texts. The construction of language at level of whole text is meant any connected stretch of language that is doing a job within social context. Thus the
‘text’ is used to refer to stretch of spoken and written language. Text may be as short as one word; or maybe as long as book. The following is the model
language:
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CULTURE
Figure 2.3.2 the Model language
From the diagram above, the outer layer represents the context of culture in which language interaction takes place. It incorporates the attitudes, values and
shared experiences of any group of people living in the one culture, culturally evolved expectations of ways of behaving, and culturally evolved ways of getting
things done or of achieving common goals that typically involve language in way or another and are referred to as genres. Each genre is characterized by distinctive
beginning, middle and end structure through which the social function of the genre is realized.
GENRE SITUATION
Tenor
Field Mode
REGISTER
TEXT
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Language is used in a context of situation as well as a context of culture. There are three variables in context of situation:
1 Field
: What is happening, the nature of the social interaction taking place: what is it that the participants are engaged in, in which
language figures as an essential component. 2
Tenor : Who is taking part; the social roles and relationships of
participant; the status and roles of the participants. 3
Mode : The symbolic organization of the text, rhetorical modes
persuasive, expository, didactic, etc; the channel of communication, such as spokenwritten, monologicdialogic, visual
contact, computer-mediated communicationtelephon, etc. Halliday, 1985: 12
Those variables function together and are responsible for the configuration of language features found in text. This configuration of language features
constitutes the “register” of a text. In addition, Halliday and Hasan 1985: 25-26 identify the context of culture
as three key aspect of the text. First, we can quickly identify the topic, what the text is about, by relating to the field of the text. It can be figured out by learning
the lexical items of the text. Second, we can identify the role of language is playing in the interaction, how is language being used whether the channel of the
communication is spoken or written. It refers to the mode of the text. The third aspect is the interpersonal relationship between the interaction and that is
connected with the tenor of the text.
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2.3.2 Genre
