Pedagogical Content Knowledge (PCK) has been one of the chief frameworks that widely employed by educators and researchers in order to examine and develop teachers knowledge of integrating content into the right pedagogy. In this article authors purposes to describe PCK of science teachers using an instrument developed by John Loughran, well known as Content Representation (CoRe). A core is constructed by asking teachers to identify “the big ideas” associated with teaching a topic to students. Participants were science teachers from a secondary school and have different ages from 21 until 34 years old. They were completed Content Representation to gain the data about their ability in PCK. Our results reveal that the teachers have different knowledge of PCK. Teachers knowledge of their PCK is related to working experience and professional development.

The ability of teachers to integrate technology into learning is quite important in facing the rapid technological progress in the era of industrial revolution 4.0. These technological advances need to be followed by the development of learning that can support these changes. Therefore, science teacher needs to be accompanied by an excellent competency, namely TPACK (Technological Pedagogical and Content Knowledge). The purpose of this study was to see the impact of the implementation of TPACK design in teaching and learning activities carried out by the teacher to students learning activities. Descriptive methods are applied to obtain data on teacher TPACK abilities and their implementation using TPACK instruments, and student activity observation sheets. Participant of this study is three science teachers. The ability of TPACK teachers who have high to lowest abilities are teachers A, B and C. Likewise with its relation to students as seen from student learning activities and outcomes. Consecutive activities with the percentage of activity 86%, 80% and 50%. Because the teacher's TPACK ability and its relation to students have the same pattern, ie the better the TPACK ability of the teacher, the activities of the students being taught are also more active. So it can be concluded that the ability of TPACK teachers has a relationship to student activities.

Technological pedagogical and content knowledge (TPACK) has been one of the steering frameworks that widely employed by researchers in order to examine and develop teachers' knowledge of integrating technology into instruction. This thing also viewed as a modern signature pedagogy within science teachers education integration of technology with science area content and effective pedagogy. In this article the author purposes to describe TPACK of science teachers using a new contextualized TPACK model with global warming. The participants were science teachers from three districts in Indonesia and have different ages from 24 until 34 years old. They were completed questionnaire to measure their ability to sync content, pedagogy, and technology in global warming material. Content Representation was applied to support quantitative data. Our results reveal that the teachers have different knowledge of TPACK. The implications of this study are that experienced teachers perceived higher barriers in integrating technology in classrooms than less experienced teachers.

ABSTRAKContent knowledge (CK) memberikan gambaran berupa pengetahuan guru tentang informasi terkait konten materi yang diajarkan kepada siswa. Selain itu Content Knowledge merupakan pengetahuan yang semestinya dikuasai oleh guru yang mencakup fakta, konsep, prinsip, hukum, dan teori. Selain itu CK juga menggambarkan kemampuan guru untuk mengorganisasi materi-materi yang akan diajarkan. Penelitian ini bertujuan untuk memberikan profil content knowledge guru pada materi global warming. Metode yang digunakan adalah metode deskriptif. Subyek pada penelitian ini adalah tiga orang guru SMP yang berasal dari sekolah yang berbeda-beda. Masing -masing guru diminta untuk menguraikan konsep esensial atau big ideas pada materi Global warming sebagai representasi dari Content Knowledge guru tersebut. Kemampuan Content knowledge (CK) guru diukur dengan menggunakan instrument CoRe (Content Representation) yang berisi delapan item pertanyaan. Hasil penelitian menunjukkan bahwa Content Knowledge (CK) guru berada pada kategori sedang. Kemampuan guru dalam mengimplementasikan CK materi Global warming berupa pengembangan dan pemilihan tugas, pemilihan representasi dan penjelasan, interpretasi tanggapan siswa, penekanan pada pemahaman siswa dan analisis kesalahan serta kesulitan yang mungkin dialami siswa. ABSTRACTContent knowledge (CK) provides an overview of teacher knowledge about information related to material content taught to students. In addition, Content Knowledge is knowledge that should be mastered by teachers which includes facts, concepts, principles, laws, and theories. In addition CK also describes the ability of teachers to organize the material to be taught. This study aims to provide a profile of teacher content knowledge on global warming material. The method used is descriptive method. The subjects in this study were three junior high school teachers who came from different schools. Each teacher was asked to elaborate on an essential concept or big ideas on the subject of Global Warming as a representation of the teacher's Content Knowledge. The ability of teacher Content knowledge (CK) is measured using the CoRe (Content Representation) instrument which contains eight question items. The results of the study show that the teacher's Content Knowledge (CK) is in the medium category. The ability of teachers to implement CK material Global warming in the form of development and selection of tasks, selection of representations and explanations, interpretation of student responses, emphasis on student understanding and analysis of errors and difficulties that may be experienced by students.