Developing Electrical Magnetic Textbook Based On Technological Pedagogical Content Knowledge (TPCK)

Electrical magnetic is a compulsory subject in the physics education program. One of the learning outcomes and graduates in the curriculum is to be able to analyze subject matter (pedagogical content knowledge). Researcher's observations during giving lectures on magnetic electricity showed that students paid less attention to the importance of understanding on the relationship between learning outcomes and teaching material during lectures. Thus, this phenomenon is appointed as one of the lecture evaluations in the study program. The lecture’s evaluation results in a recommendation to develop textbooks that are adjusted in learning outcomes and graduates that refer to the curriculum of the physics education program. It is not enough to stop here, the problem findings continue for online learning related to Work From Home policies during the pandemic. This of course requires the availability of references that can be open accessed. Hence, the researchers then attempted to develop electrical magnetic textbook based on PCK (pedagogical content knowledge) which contained material content and material content analysis according to learning outcomes and graduates in the curriculum of the Physics Education. This study aims to : (1) determine the feasibility of electrical magnetic textbook based on PCK according to experts. (2) determine the responses of students after using electrical magnetic textbook based on PCK. The research method uses research and development design by gathering information stages and references, designing, developing, product, validating, and revising the product. The research was conducted in 2020 in the physics education study program IKIP PGRI Pontianak. Data collection techniques are in the form of indirect communication techniques. Overall, electrical magnetic textbook based on PCK have been produced. The validation results show that textbooks have an average validation score of 77.77% with Eligible criteria. The students’ responses analysis show that textbooks developed have an average score of 78.52% with high criteria. After the revision, the textbook was presented with an online ISBN and open access on the online media.


I. INTRODUCTION
Physics is a subject in the science family that can be developed inductively and deductively using analytical thinking skills in solving problems related to natural events both qualitative and quantitative; it also can develop knowledge, skills and self-confidence.
Electrical magnetic is a compulsory subject in the physics education study program curriculum at IKIP PGRI Pontianak. Learning Boisandi accessed. This is because the technology used in Indonesia is growing rapidly in all aspects of society. for example, the increasing use of social media activities and website (Das et al., 2016;McKemmish et al., 2017;Poushter et al., 2018;Rizal et al., 2020).
There is a close relationship between the quality of textbooks with an understanding of the nature of science, such as empirical, method, theoretical, creative, social and cultural dimensions (Ramnarain & Chanetsa, 2016  competence related to content mastery (Rehmat & Bailey, 2014;Yeh et al., 2015;Nofrion et al., 2018). PCK is also a potential indicator of the quality of learning. PCK will continue to develop in accordance with the teacher's teaching experience (Anwar et al., 2014;Widodo, 2017;Nasar et al., 2020). The

II. METHODS
The research was carried out in the academic year of 2020/2021 in the physics education study program of the Teacher Training and Education Institute (IKIP) PGRI Pontianak, West Kalimantan.

A. Research and Development Design
This study refers to the research and development design of (Bord & Gall, 1983) as presented in Figure

Validation by experts
At this stage, validation is carried out by experts, namely validation by material experts and media experts.

Revision
Revisions were made after validation by a team of media experts and material experts.

The Limited trial
The textbook magnetic electricity based on PCK tested on 21 student of the physics education on the IKIP PGRI Pontianak.

Revision
The revisions was carried out after a limited trial.

Products
After the revision was made, an electrical  Riduwan, 2014) To analyze the students' response after using electrical magnetic textbook based on PCK, Equation (2) was used: where % is the percentage of questionnaire, ∑ k is the total score of respondent's answers, and is the maximum number of score. The data is then concluded based on Table 2 below:

D. Validation by experts
At this stage, validation is carried out by

E. The limited trial
Trials were conducted on 21 students of the physics education IKIP PGRI Pontianak.
Based on the results of limited trials, it is known that the magnetic electricity textbook based on PCK is eligible. Based on Figure 1.

A. Conclusion
The electrical magnetic textbook based on PCK was produced through the research and development design stage. Based on the results of data analysis that has been conducted, the validation results was an average of 77.77% or it has met the eligible criteria. The students' responses on the electrical magnetic textbook based on PCK reached 78.52% (high criteria).

B. Suggestion
Follow-up research is needed. The follow-up research that is meant to do is wider trial and mass product manufacturing stage research from the results of the development of textbooks that have been made.