The new Coronavirus (namely Covid-19) discovered in 2019 in Wuhan has sickened more than three million people in worldwide. Because Covid-19 is spreading so fast and killing so many people, it has encouraged researchers to conduct research and publish it in various mass media, including journals. This study aims to analyze the scope of Covid-19 research using a bibliometric review. To obtain information about Covid-19 studies, the Scopus database was used. Topic areas with titles, keywords, and abstract criteria in Covid-19 studies were used as a reference for extracting search results. Search result extraction was done using VOSviewer. After that, the results of bibliometric mapping were analyzed further. A total of 3,513 articles were found in the Scopus database accessed on April 25, 2020. There was a significant increase in the number of publications on Covid-19 from 2019 to 2020. Among all countries, China contributed the most publications. Meanwhile, the keywords coronavirus, pandemic, and impact turned out to be the area's most widely discussed. Through VOSViewer we analyzed how many articles have been published about Covid-19 and its relationships to a topic area. This review certainly can provide a reference point for further research related to the Covid-19 outbreak.

ABSTRAKTujuan dari penelitian ini adalah mendapatkan modul fisika berbasis problem based learning pada topik keseimbangan dan dinamika rotasi untuk meningkatkan kemampuan pemecahan masalah fisika siswa SMA dan mengetahui bagaimana kelayakannya serta respon siswa terhadap modul tersebut. Metode yang digunakan dalam penelitian ini adalah penelitian dan pengembangan. Prosedur penelitian yang digunakan memanfaatkan modifikasi dari langkah-langkah penelitian yang dikemukakan oleh Borg & Gall. Hasil penelitian ini, yaitu sebuah modul fisika berbasis PBL pada topik keseimbangan dan dinamika rotasi untuk meningkatkan kemampuan pemecahan masalah fisika siswa SMA. Kelayakan modul pembelajaran fisika berbasis PBL menurut ahli materi, ahli media dan guru fisika SMA untuk komponen isi, penyajian dan bahasa memiliki kriteria sangat valid dengan presentase masing-masing sebesar 94,8%, 95%, dan 88,5%. Respon siswa terhadap modul fisika berbasis PBL pada uji coba terbatas diperoleh presentase sebesar 91% dan 91,25% pada komponen isi dan tampilan modul.

Previous research reports mention several learning models which are potential in improving students' thinking skills. This quasi-experimental research aims to determine the difference in critical thinking skills of the students who learned by using inquirydiscovery model and conventional learning model in class X. The treatment of this research was teaching physics by inquiry-discovery model and conventional learning model. The instruments of critical thinking skills were developed by the researcher and validated by an expert prior to use. The results of the research showed that there was a significant difference in the critical thinking skills between the experimental class and the control class. The result of critical thinking skills of the students in the inquirydiscovery class was higher than that of the conventional learning class. The research recommends that teachers empower HOTS ability of the students in the inquirydiscovery class, so that a meaningful learning and student-centered learning can be created. Future researches are needed to explore the contribution of inquiry-discovery model on students' critical thinking skills.

The concept of low carbon education is one solution to provide knowledge to students related to low carbon behavior. The purpose of this paper is providing an extensive bibliometric literature review on 'low carbon education'. Articles found by Publishing or Perish (PoP) software with the Google Scholar database. There were 55 out of 97 articles found from Google Scholar data ba se ranging from 2014 to 2019 analyzed in this study. The chosen references were then managed using a referencing manager software namely Zotero. After managing the database, this study classified and visualized it using VOSviewer software. Overall, this review provides an appropriate reference point for further research on 'low carbon education'.

Inquiry-discovery learning plays an important role in improving high-order thinking skills (HOTS) and scientific literacy (SL). In this HOTS and SL research, it was designed with Inquiry-discovery based learning. The purpose of this study was to promote Inquiry discovery models in empowering higher-order thinking skills and scientific literacy in physics with different classes. This research used Quasi-Experimental Design research, and Pretest-Posttest Control Group Design. The research analysis design matrix used two-way ANOVA. The sample was taken from two classes, namely the experimental and control classes of 68 students. The results of the study prove that Inquiry discovery can improve HOTS and SL physics of students. Thus, inquiry-discovery can be recommended to increase student's HOTS and SL physics when compared to conventional classes. The novelty of this study is that inquiry-discovery learning models are more likely to reconstruct students' scientific knowledge of physics on aspects of HOTS and SL with real-world life.

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The blended learning model is a learning that uses online facilities combined with face-to-face learning (synchronous learning-asynchronous learning). The purpose of this research is to develop online learning that can be used by two PGRI universities in Indonesia as an online learning media. This research applies research and development method 4D Thiagarajan (Define, Design, Develop, and Disseminate). Data analysis technique used is descriptive qualitative data analysis. The result of this study is an online learning system that can be used by Universitas Kanjuruhan Malang and Universitas PGRI Madiun in Basic Physics course. This system uses the MOODLE (Modular Object-Oriented Dynamic Learning Environment), therefore it has the advantage that it is easy to use by all lecturers.

This study aims at developing multimedia instructional material at the elementary school level by using the MDLC (Multimedia Development Life Cycle) model. This research developed multimedia platform which consisted of learning modules and videos. MDLC constitutes methods consisting of concept, design, collection of materials, assembly, testing, and distribution. In developing multimedia by using MDLC, it was based on a flowchart system and a learning video story board. The results indicated that the multimedia developed was in accordance with the MDLC steps. Based on the results of alpha and beta tests, it indicated that the e-learning multimedia developed is feasible and practical to be used by elementary school students. Multimedia that was developed employs a variety of learning sources that are able to enrich student’s knowledge in a more interactive presentation.