25 The percentage was calculated by the amount of the students who chose
the options divided by the total number of the students. The formulation is presented as follows.
� �
x 100
Note: n = the number of the students who chose the option
N = total number of the students The result of the questionnaires can be seen in the appendix C.
2. Data Analysis Technique of Post-design Study
In the post-design study, the writer distributed questionnaire to the English teacher of SMKN 1 Nanggulan and two lecturers of ELESP Sanata Dharma
University. They were two types used in the questionnaire, likert scale and open- ended questionnaire. The likert scale which ranged from 1 to 4 was adopted from
Best 1970, p. 173. The degrees of agreement were classified as follow: 1 strongly disagree, 2 disagree, 3 agree, and 4 strongly agree. The designed
materials would be acceptable if the central tendency for each statement was range 3 to 4. According to Brown and Rodgers 2002, central tendency, the trend
of a set of numbers that clusters around particular value, is a convenient way of summarizing data of nominal categories such as Likert scale. In this study, the
writer used mean to measure the central tendency. The formulation of calculating the mean is as follows.
26
M =
x �
Note: M = mean
x = sum of score N = total number of participants
For the second part of the questionnaire, the writer summarized the participants’ opinions and suggestions into paragraphs. This data was used to
improve the designed materials. After the data from the evaluators were analyzed, it showed that the materials were acceptable. In the first part of questionnaire, the
evaluators stated their degree of agreement on the statements. The result ranged from 3- 3.67, indicating that the materials were well-developed. The completed
result of expert validation can be seen in Table 3.1 The Result of Expert
Validation
.
Table 3.1 The Result of Expert Validation No.
Respondents’ opinion Central Tendency
N
x
Mean A.
Learning Indicators
1. The indicators are suitable with the competence
standard 3
11 3.67
2. The indicators are suitable with the basic
competences 3
11 3.67
3. The indicators are well-formulated
3 9
3
B. Learning Materials
4. The materials help the students to achieve the
indicators 3
11 3. 67
5. The materials are suitable to teach speaking for tenth
grade students 3
11 3. 67
6. The activities are fun
3 9
3
