10 list of vocabulary. In line with this study, the present research investigated a
textbook for grade 11 in vocational high school in Salatiga.
THE STUDY 1.
Method of Research
This study used descriptive method. According to Rivera, M. and Rivera, R. 2007 discover facts on which professional judgment could be based.
Moreover, it involves description, analysis, and interpretation .
By using a descriptive method, English textbook for Vocational High School was analyzed in
order to figure out the texbook whether it is suitable or not. Therefore, the description will analyze the vocabulary included in the category of K1 words, K2
words, academic words, and off-list.
2. Material
The material of this study was English course textbook of Grade 11 used in vocational high school. The textbook was published by Kemendikbud in 2014
and the title was Bahasa Inggris. The book contains of five chapters. Each chapter has conversations for practicing speaking skill, writing skill, listening skill, and
different types of reading text such as narrative and descriptive. For the exercise, there were also grammar including tenses and for reading exercise, there were
reading comprehension, matching, synonym of vocabulary etc. The reasons of selection of this textbook as the sample of this study is the textbook is widely used
in vocational high school and it is the primary English vocabulary input for the
11 students of eleventh grade at their schools. Later on, it would be useful for the
teachers in order to explain the material in different background knowledge.
3. Research Instrument
To analyze the data, this study used lextutor as vocabulary profiler. This program is used to examine the vocabulary profile that is used in the textbook.
According to Astika 2014, vocabulary profiler is a program that can be used by copy the text into the program. On the other hand, the analysis will show the
percentages of type words families according to the four frequency levels: K1 words, K2 words, academic words, and off-list.
4. Data Collection
In collecting the data, every chapter would be copied in word file. The data is just words in English. Thus, the data which is out of context will be
omitted. Such as: number, proper noun, identification of book, etc. In order to analyze the data, open the vocabulary profiler from the website on
http:www.lextutor.ca and choose VP Classic v.4. Then the next was upload the
word files the Vocabulary profile to be analyzed.
5. Data Analysis
The analysis was automatically produced by the tool. The result of data analysis was presented in tables. The tables showed how many words the text
contained from the following four frequency levels: K1 words, K2 words, academic words, and off-list.
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FINDINGS AND DISCUSSION
This section presents the results of the analysis. There were 14442 words analyzed using The Compleat Lexical Tutor, v.4. The vocabulary profile is
presented in form of a table. The first part of this section presents the overall vocabulary profile of the textbook showing the proportions of the vocabulary
frequency classifications. The second part shows the negative vocabulary profiles of K-1, K-2, K-3 AWL with lists of the vocabulary items that were not found in
the three textbooks. The last part of this section shows the comparison of vocabulary profile across some chapters of the textbook.
1. The Overall of Vocabulary Profile
