This study aims to determine the profile of cognitive ability. The research method used descriptive quantitative. The research subjects are 50 eleventh graders from two high schools in Bandung. The research instrument used multiple choice questions with five options to measure cognitive ability and essay questions for 4 of 5 critical thinking skill's indicators by Ennis's. This study uses descriptive analysis techniques based on the percentage of cognitive abilities and critical thinking skill. The results showed on cognitive ability, 62.00% of students are able in C1 cognitive domain; 31.30% are able in cognitive domain C2; 21.30% are able in C3 cognitive domain; 25.00% are able in C4 cognitive domain; And on critical thinking skill, that is; 28.00% of students are able to identify stated reasons; 10.67% are able to agreement among sources; 11.33% are able to inter explanatory conclussions and hypotheses; And 6.00% are able to select criteria to judge possible solutions. The implication is, student's cognitive ability and critical thinking skill are still low, so there must be an effort to improve them through learning innovations. Keywords: cognitive ability, critical thinking skill, work and energy AbstrakPenelitian ini bertujuan untuk mengetahui profil kemampuan kognitif dan keterampilan berpikir kritis siswa SMA pada materi usaha dan energi. Metode penelitian yang digunakan adalah deskriptif kuantitatif. Subjek penelitian sebanyak 50 siswa kelas XI dari dua Sekolah Menengah Atas di Kota Bandung. Instrumen penelitian menggunakan soal pilihan ganda dengan lima option untuk mengukur kemampuan kognitif dan soal uraian untuk mengukur 4 dari 5 indikator keterampilan berpikir kritis yang dikemukakan oleh Ennis. Analisis data menggunakan teknik analisis deskriptif berdasarkan persentase kemampuan kognitif dan keterampilan berpikir kritis siswa. Hasil penelitian menunjukkan bahwa pada kemampuan kogitif, 62,00% siswa mampu dalam ranah kognitif C1; 31,30% siswa mampu dalam ranah kognitif C2; 21,30% siswa mampu dalam ranah kognitif C3; 25,00% siswa mampu dalam ranah kognitif C4; dan pada keterampilan berpikir kritis siswa yaitu, 28,00% siswa mampu dalam indikator mengidentifikasi alasan yang dinyatakan; 10,67% siswa mampu dalam indikator persetujuan di antara sumber; 11,33% siswa mampu dalam indikator menyimpulkan penjelasan, kesimpulan, dan hipotesis; serta 6,00% siswa mampu dalam indikator memilih kriteria untuk mempertimbangkan solusi yang mungkin. Implikasinya, kemampuan kognitif dan keterampilan berpikir kritis siswa masih tergolong rendah, sehingga harus ada upaya untuk meningkatkannya melalui inovasi-inovasi pembelajaran.Kata-kata Kunci: kemampuan kognitif, keterampilan berpikir kritis, usaha dan energi Naskah diterima: 7

This research aims to determine the effectiveness of project-based learning method using mind maps in science learning for the topic of waste management and its solution to improve students’ environmental attitudes. It adopted a quasi-experimental method with the pretest-posttest control group design. The subjects of the research consisted of the seventh grade students of two classes in one of the private junior high schools in Bandung Regency. The instrument used for data collection was a pretest and posttest on environmental attitudes for students, a questionnaire, and observations of environmental attitudes of the students from peer assessment, teacher’s observations in the school, and parents’ observations at home. The data were analyzed by considering the gain value with its normalization and counting the size effect. The results of the data analysis indicated that gain <g> = 0.61 for the experimental class and <g> = 0.41 for the control class, and effect size d = 0.37. These values mean that there were improvements in the students’ environmental attitudes in the school and at home after the application of project-based learning with mind maps. It is concluded that PjBL (Project-Based Learning) method using mind maps for the theme of waste and its management works effectively since it has a small effect on improving students’ environmental attitudes.

This research is a descriptive study that describes the learning of chemistry during the Covid-19 pandemic. The respondents in this study were 127 high school students from the West Java and Banten provinces. A Google Form questionnaire was used to collect the data. The results showed that the most widely used online class applications were WhatsApp Group feature, Google Classroom, and Zoom. Students also used printed textbooks, e-books, and student worksheets as learning media. Students did laboratory practice at home using easily found tools and materials. However, a small portion of the respondents ( 11 %) used materials purchased from a chemical store, and another small portion of the respondents ( 14 %) used virtual laboratories. They reported the results of their practice by making a laboratory practice report as well as through video activities and Microsoft PowerPoint for presentation. Students learn from home with varying durations. Most students experienced obstacles during the learning process so that they prefer learning face-to-face in class as usual. Therefore, the teacher must prepare a variety of strategies for distance learning so that the students can learn chemistry from home with fun. Some strategies that can be applied are providing audio-visual learning media or computer/android-based games for chemistry, using the online class application that accommodates interactions similar to face-to-face learning, providing laboratory practice using tools and materials that can be easily found around the house, providing virtual lab application, and providing more opportunities for students to ask questions about chemistry topics that they do not understand.

The research aims to identify the impacts of embedding non-traditional writing tasks within the course of modern physics conducted to the students of Physics Education and Physics Study Programs. It employed a quasi-experimental method with the pretest-posttest control group design. The used instruments were tests on conceptual mastery, tests on critical thinking skills, and a rubric of writing assessment. The data were analyzed by determining the percentages of average normalized gains, Cohen's d, and correlational analysis. Based on the results of data analysis, it is found that the different treatments in the non-traditional writing tasks given to the students of the Physics Education and Physics Programs have the following impacts: 1. There was a significant difference in the increased conceptual mastery and critical thinking skills; 2. There was a difference in the writing quality of the students of the Physics Education and Physics Program; 3. There was a correlation between writing quality and conceptual mastery with a high degree relationship and there was a correlation between writing quality and critical thinking skills with a low degree relationship; 4. Increased conceptual understanding was influenced by the writing domain.Key Words: critical thinking skill, quasi-experimental method, non-traditional writing tasks, conceptual mastery, writing to learn INTRODUCTIONWriting is a part of teachers' and scientists' job to help them in memorizing, making reports, planning and regulating, encouraging critical thinking skills, self-reflection over conceptual mastery, and communicating. Writing is also a part of science, although many prospective scientists and pre-service teachers do not receive formal training in writing (Barrass, 2000). In the curricula of Indonesian teacher training and education institutes, writing knowledge and skills are only embedded within the course subjects of English and Indonesian, each with two credit hours. In the descriptions of the two courses, writing is only a subtopic among many other topics taught. Based on the 70Enhancing Critical Thinking Skills and Writing Skills … International Journal of Instruction, April 2017 • Vol.10, No.2 interview with lecturers who teach the courses, obtained information that writing knowledge and skills are taught to students, but not optimally. The less than optimal teaching of writing has resulted in the low writing skills of pre-service teachers and future scientists. This was reinforced by one of the following fact: students are required to write articles research results and published by local journaling which is managed by the department of physical education. Each year there are 60 articles on average reviewed by editors, out of which only 27% of eligible. In addition, there is a lack of support for them to develop their writing skills. Thus, instructional strategies that can increase conceptual understanding as well as increasing the writing skills of pre-service teachers and prospective scientists are needed. Based on the facts, t...

Critical thinking skills are an important and necessary skill to confront the challenges in the 21st century. Critical thinking define as basic skills that should be owned by someone to be able to develop thinking skills at a more complex level. This research is aimed to determine junior high school students’ critical thinking skills in science learning. This research is descriptive qualitative research using instruments developed based on aspects of critical thinking skills according Ennis which include elementary clarification, basic support, inference, advanced clarification and strategies and tactics. The subjects in this research were 30 students in grade eight of a junior high school in Bandung which was chosen using purposive sampling technique. The results of the study show that the average percentage of the five aspects of critical skills received by students is 45 and falls into a very low category. The conclusion from this skill of the students still was in a low category, so that needed a way to enhance on indicators of students’ critical thinking skills.

Abstract. This paper reports a Physics lesson using video tracking analysis applied in Newton's Cradle experiment to train student's multiple representation skill. This study involved 30 science high school students from class XI. In this case, Tracker software was used to verify energy conservation law, with help from data result such as graphs and tables. Newton's Cradle is commonly used to demonstrate the law of energy and momentum conservation. It consists of swinging spherical bobs which transfers energy from one to another by means of elastic collisions. From the video analysis, it is found that there is a difference in the velocity of the two bobs of opposite ends. Furthermore, investigation of what might cause it to happen can be done by observing and analysing the recorded video. This paper discusses students' response and teacher's reflection after using Tracker video analysis software in the Physics lesson. Since Tracker has the ability to provide us with multiple means of data representation way, we conclude that this method could be a good alternative solution and might also be considered better than performing a hands-on experiment activity in which not every school have suitable laboratory equipment.

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The ability of the teacher to represent a concept using various types of representation is a critical competency. Teachers who have limited multiple representation abilities will not be able to provide a holistic and appropriate learning experience because students have different abilities in constructing their knowledge. This study aims to determine the multiple representation ability of Physics teacher by using instruments to test multiple representations on the topic of Newton’s law consisting of text representations, images, pictorial diagrams, tables, graphs, and mathematical equations. The subjects in this study were 30 high school Physics teachers in North Maluku who were determined based on the purposive sampling technique. Data on multiple teacher representation abilities were analyzed using descriptive statistics. The results of the data analysis showed that the multi-representation ability of high school physics teachers in Newton’s law concept was in the medium category (55.7%) with the highest achievement occurring in the type of mathematical representation and the lowest in the pictorial diagram representation types for both female and male teachers. Besides, based on data implemented using SPSS 2.0, it can be concluded that there are no significant differences with the ability of teacher’s multi-representation based on gender and teacher’s teaching experience.