65 and WH questions and developed the themes. In presenting the data, the
researcher used tables. The researcher provided detail percentages, reasons or explanations, and examples that had been arranged based on the themes. In the
process of interpreting, the researcher extracted the meanings, developed generalizations, and provided explanations.
b. Materials Validation Questionnaires
In the materials validation questionnaires, the researcher used scaled questions Linkert scale and open-ended questions WH questions. Likert scale
was selected to let the participants indicate their responses to the statements on a continuum, using points of agreement.
1 : if the participant strongly disagrees with the statement 2 : if the participant disagrees with the statement
3 : if the participant agrees with the statement 4 : if the participant strongly agrees with the statement
The option that showed if they neither agree nor disagree or they do not know or doubt undecided was omitted because the option often causes ambiguity and
difficulty in administering the result. The data from the scaled questions were analyzed using central tendency. The researcher measured the central tendency
using mean symbolized as M. Mean is the average point of the sum of the score. The mean was calculated using a formulation.
Note : M
: The average point
66 ∑χ
: The sum of the score : The number of participants
Then, the researcher interpreted and presented the data. In interpreting the quality of the materials, the researcher used following criteria:
1.01 – 2.50 : The materials were poorly designed and not acceptable.
The researcher had to change the nature of the design. 2.51
– 3.50 : The materials were good. However, the researcher needed to revise and improve some crucial parts of the design.
3.51 – 4.00 : The materials were well designed and acceptable.
The researcher could keep the nature of the design, revised, and improved few parts of the design.
In presenting the data, the researcher used a table. The researcher provided detail scores of the nine elements in the materials that had been arranged based on the
themes. In the process of organizing and familiarizing, the data from the open-
ended questions WH were transcribed. The researcher listed all feedbacks opinions and suggestions and comments from the practitioner and experts. Then,
the researcher made notes that indicate the key ideas of the data. After that, the researcher organized them into several units by questions. In the process of coding
and reducing, the researcher identified the concept of the units and labeled them. Then, the researcher identified the similarities and differences among them. After
that, the researcher arranged all units that had the same labels and developed the categories. Last, the researcher linked some of the categories and developed the
themes. In developing the theme, the researcher referred to the nine elements that
