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Learning trends in the 21st-century require students to have the ability to sort appropriate information from certain sources. To do this, students must have critical thinking skills. One of the learning models that can facilitate students to think critically is a guided-inquiry lab. Thus, the purpose of this study was to quantitatively analyze the impact of the implementation of the guided-inquiry lab model on students' critical thinking skills on mechanics material. A pre-experimental method employing one group pretest-posttest only design was applied to obtain students' critical thinking skills data before and after the implementation of the guided-inquiry lab model. A total of 32 students from a junior high school in the city of Karanganyar, Central Java, were involved as the samples in this study. The data obtained were then analyzed using N-gain calculations. Based on the data analysis, there are 81.25% of students have medium creative thinking skills after being taught with a guided-inquiry lab, meaning there is an increase in the average score of students after being taught using a guided-inquiry lab model. It can be concluded that the implementation of the guided-inquiry lab model is effective to improve students' critical thinking skills

The application of Integrated teaching materials in teaching and learning science is very important, to support students acquire comprehensive knowledge and skills and make the learning process more memorable. Teachers must be good at choosing methods and packaging the teaching materials well to attract students' learning interests. This study aims to examine the analysis of the development of integrated Science on Student Worksheet using the steps of cooperative methods of Student Teams Achievement Divisions type. The study was conducted using a qualitative approach (Multi-case single-site case study design). The data were collected through analytical documents and analyzed thematically with NVIVO 10 software. The results showed that the steps to develop integrated science on Student Worksheet using cooperative method of Student Teams Achievement Divisions are: (1) In Student Worksheet there must be motivation and apperception; (2) team building; (3) presentations from teachers; (4) learning activities in teams must be heterogeneous; (5) implementation of individual quizzes; (6) awarding. The results of this study are discussed with various results of previous research.

The trend ing topic in today's education is computational thinking skills which are used to help to solve complicated problems easier . This study aim s to identify the level of knowledge and self-confidence of science teacher candidates ( physics and biology ) on computational thinking skills. The survey research design was used through a mixed-method approach by combining quantitative and qualitative approaches. The quantitative stud y involve d 1016 randomly selected group s of science teachers while in the qualitative study, eight science teachers were chosen based on the scores obtained from the quantitative stud y . The questionnaire was used as a quantitative data collecting technique to analyze descriptive statistics. Then, an interview was used as the qualitative data collecting technique and was analyzed through theme creation. The findings show that science teacher candidates have a high level of knowledge and self-confidence. The implication of this study is very important for t eacher candidates because computational thinking can help to facilitate problems solving in everyday life. Teacher candidates need to be given knowledge and understanding of computational thinking skills, to have readiness and self-confidence in facing the challenges of the learning in the 21 st - century

This study aims to determine the ability of students’ metacognition in solving abstract problems in physical material. The study involved students who took through the test. Metacognition ability data obtained through written test consisting of questions metacognitive knowledge and metacognition skills. Data analysis is done descriptively. The result of the research shows that declarative knowledge dominates students metacognition knowledge, that is students can recognize the difficult problem and able to interpret in other forms but less able to recognize method used and how to finish, while students' metacognition skills are more dominant in planning and monitoring fields. Prediction and evaluation skills are still relatively low. Overall, metacognition ability of students included in the low category.

The purposes of this research were to estimate the crystallite size, density, and chemical composition of the ingot Ti: Al2O3 crystal grown by the Czochralski method. The crystallite size and composition of Ti: Al2O3 crystals had been determined using x-ray diffraction (XRD) and energy-dispersive x-ray spectroscopy (EDXS). Based on the Archimedes principle, the density of the crystals had been determined. The XRD patterns showed a single central peak with high intensity for all samples. It indicated that all samples had a single crystal. The average value of the samples' crystallite size was in the range of 20.798 nm to 34.294 nm. The ingot crystal density and Ti composition increased from the top to the bottom part because the solid solution was distributed unevenly during the growth process.

The purposes of the research were to know the difference between the student cognitive achievement who learned using PjBL and Discovery Learning models, between the student who had the high and low analyzing ability, and their interaction. The research population included the seventh-grade students in one of the Islamic state schools in Surakarta. The research subjects were students with different knowledge capabilities from low to high levels. The method has been implemented was experimental research. A two-way Anava test was chosen for the technique of analyzing data in this research. In collecting data, the multiple-choice test was used based on aspects of analytical abilities, namely mental flexibility, verbal reasoning and reading comprehension, scientific and mechanical reasoning. The result showed that there is the effect of the application of PjBL and Discovery learning model on cognitive achievement with the significance value 0,05, there is the effect between high and low analyzing ability on cognitive achievement with the significance value 0,05 and there was no interaction between learning model and analyzing ability on cognitive achievement with the significance value 0,05. This study implies that the PjBL model and discovery have a significant impact on student learning outcomes so that they can be used for other science subjects by paying attention to the internal factors of students that will be used as a review

The purpose of a learning media is to become a learning device to facilitate the teaching and learning process in class. The learning process would be more efficient, and it would help students concentrate better. This research aims to develop an android-based learning media application so teachers and students can use it in the teaching and learning process. This research uses the RD (Research and Development) method. This research uses ADDIE (Analysis, Design, Development, Implementation, and Evaluating) development model which results in a product, which is a valid learning media that can be implemented according to validator assessment that was done in the product trial test in Universitas Negeri Yogyakarta. It can be concluded that this media belongs in the good category based on assessment from media and material specialists validator, 85,7% average percentage is obtained and belongs to the valid category, so android-based physics media integrated with landslide disaster education is feasible to be used in physics learning. This media is made with an interesting and interactive interface so students can have a better understanding of physics learning integrated with landslide disaster education as well as disaster preparedness.

This research aimed to determine the effectiveness of the implementation of tsunami understanding media through Android-based physics mobile learning in improving students' problem-solving skills and natural disaster preparedness. This study employed quasi-experiment research with a non-equivalent control group design. This research subjects were fifty-six students of class XI IPA at SMA N 1 Kretek, Bantul, Yogyakarta. The sampling technique employed in this research was the simple random sampling technique to determine the experimental and control groups. The research data had been obtained through pretest and posttest in the form of essay tests. The data obtained were then analyzed using N-gain. The analysis results were used to determine the effectiveness of the media using the Hotelling's Trace test in MANOVA test analysis. Normally distributed and homogeneous data are required to perform the multivariate analysis. The results showed that the tsunami understanding media through Android-based physics mobile learning improved students' problem-solving skills and natural disaster preparedness compared to the learning using PowerPoint presentation. The research decisions were based on the significant value that was smaller than 0.05 (0.0000.05), and the value of the Partial Eta Squared was 0.359 in the broad category.