words will enrich students. Furthermore, those words can help students in recognizing word in the text. On the other hand, the smallest learning opportunity
is found in chapter 8 20.72. Most of tokens used in chapter 8 found in GSL800. Thus, it is not highly demanding for students and they only get small
learning opportunity. Fortunately, all of the chapters show that GSL500GSL800 GSL1000. See
the figure below.
Figure 4.4 The Percentage of Tokens from Each Word List in Each Part of Private Course book 2
From figure 4.4, it can also be concluded that in every part of the book, except chapter 5 and 13, the percentage of token, type, word family in GSL500 is
bigger than those in GSL800. And the percentage of token, type, word family in GSL800 is bigger than those in GSL1000.
5. Further Discussion
All four course books being researched by the researcher, indicates that the charateristics of Junior High School course books, especially for grade 8 or year
2, have adequate vocabulary needs for students since it shows only 64 until 81
20 40
60 80
100
C h
a p
te r
1 C
h a
p te
r 2
C h
a p
te r
3 C
h a
p te
r 4
C h
ap te
r 5
C h
a p
te r
6 C
h a
p te
r 7
C h
a p
te r
8 C
h a
p te
r 9
C h
a p
te r
1 C
h a
p te
r 1
1 C
h a
p te
r 1
2 C
h a
p te
r 1
3 C
h a
p te
r 1
4 C
h a
p te
r 1
5 C
h a
p te
r 1
6 C
h a
p te
r 1
7 C
h a
p te
r 1
8 C
h a
p te
r 1
9
The Percentage of Tokens from Each Word List in Each Part of
Private Course book 2
GSL500 GSL800
GSL1000 Not in the list
of GSL800. The course books also have deficit of the requirement of acquiring vocabulary for grade 8. Here the detail table that show how those four books still
lack of vocabulary needed to be learned by students.
Table 4.13 Summary of Vocabulary Coverage from All Course books
This result show that those course books, as representatives of course book being used by students in Yogyakarta, have lack of vocabulary needed by
students, especially 2
nd
grade of Junior High School. Although some of the course books provide large number of tokens, various types and learning opportunity to
acquire new vocabulary, all the books only gave 64-81 of total 800 headwords GSL800 needed for 2
nd
grade to be learned. The deficit vocabulary is greately ranged between 136-286 headwords. A remarkable note for book 3, it has the
highest deficit among all. Therefore, significant improvements are needed for
BOOK 1
Word Lists Tokens
Types Word
Families of
Wordlist Deficit
GSL500 1800564.70
74721.87 452
90.40 48
GSL800 1971270.83
104530.60 654
81.75 146
GSL1000 2033473.06
122135.75 782
78.20 218
BOOK 2
Word Lists Tokens
Types Word
Families of
Wordlist Deficit
GSL500 2609266.59
77023.60 456
91.20 44
GSL800 2819771.96
107232.86 664
83.00 136
GSL1000 2896673.92
122137.43 773
77.30 227
BOOK 3
Word Lists Tokens
Types Word
Families of
Wordlist Deficit
GSL500 1548670.44
61429.72 384
76.80 116
GSL800 1644374.79
80238.82 517
64.62 283
GSL1000 1700977.36
92244.63 601
60.10 399
BOOK 4
Word Lists Tokens
Types Word
Families of
Wordlist Deficit
GSL500 2213867.39
75221.44 444
88.80 56
GSL800 2385772.62
106930.48 654
81.75 146
GSL1000 2453574.68
123235.13 767
76.70 233
those course books, especially book 3, in order to be suitable for learning vocabulary for 2
nd
grade of Junior High School Students.
B. WORD FREQUENCY OF THE COURSE BOOKS
