Graphene oxide (GO) based on coconut shell waste was successfully synthesized using a modified Hummers method, and the obtained GO was confirmed using XRD, FTIR, Raman spectroscopy, UV-Vis spectroscopy, and SEM-EDX. The XRD spectroscopy obtained the fractional content of the 2H graphite phase of 71.53%, 14.47% phosphorus, 10.02% calcium, and 3.97% potassium in coconut shell charcoal, where the GO sample tend to forms a phase of reduced graphene oxide (rGO). FTIR spectra shows compound functional groups of hydroxyl (- OH) at peak 1 (3449.92 cm −1 ), carboxyl (-COOH) at peak 2 (1719.42 cm −1 ) and peak 3 (1702.62 cm −1 ), and alcohol (C–OH) at peak 4 (1628.12 cm −1 ) and epoxy (CO) at peak 5 (1158.51 cm −1 ), which is similar to the GO synthesis from pure graphite. Raman spectroscopy analysis shows that the value of the I D /I G intensity ratio of the GO sample was 0.89 with a 2D single layer, and SEM results showed that surface morphology with an abundance of granular particles were found with different size distribution. The UV-visible results showed sufficient optical properties characterized by the spectrum, which formed because of the light absorption of the energy passed on the sample. The bandgap energy value of the sample obtained by the Tauc plot method was 4.38 eV, which indicates semiconductor properties.

This research was a descriptive case study. The purpose of this research was to describe the student’s ability to interpret the kinematics graph. The subjects of the study were 347 students of class XI science in the even semester of 2018/2019 in Luwu Raya, South Sulawesi Province, Indonesia. The research data were obtained from multiple-choice test results using instruments adapted from Test of Understanding Graph – Kinematics 2.6 and the results of in-depth interviews to find out the reasons learners choose answers and casual factors. The results of the study based on descriptive data analysis were 90 students or 25.94% in the low category, and 257 students or 74.06% were in the very low category. These results indicate the ability to interpret the graphs of students were still low, with the average achievement in answering questions on each of the highest indicators was 20.99 % on indicators identifying graphs based on the description. While the lowest average achievement was11.91%, which is the indicator to identify the graph that has a different variable. Base on the qualitative data analysis, the results are students had difficulties in solving the test, as follows: a) the difficulty in distinguishing symbol of the variables on the graph, b) the difficulty in determining the formula for solving test in graphical form, c) to determine when the curve on the graph v-t decreases then the object will move with speed slowed. The factors causing these difficulties are because students did not understand deeply about how to read graphs, how to solve test in graphical form, and did not understand the formula used to solve the test.

The objectives of this research were to examine the effect of hypermedia's implementation as physics learning tools on student's problem solving skills as well as their attitude towards the hypermedia used. The type of research was pre-experimental using one group pre-test-post-test design. The subject of this research was physics students of Fakultas Keguruan Ilmu Pendidikan (FKIP) or Teaching and Education Faculty, Universitas Muhammadiyah Makassar year 2017/2018 totalling 31 students. Data was analyzed by using descriptive statistics namely N-Gain test. The results showed that the highest score of problem solving skill achieved before the implementation of hypermedia was 32 and 63 after the implementation from the ideal score of 76. N-Gain analysis showed the average improvement of problem solving skills before and after the implementation was 0.59 and in category average 74.19%. Score of every indicator of problem solving skills before the implementation was below 50% and above 50% afterwards. Meanwhile, perception analysis showed that the average score was 84.12% indicating that students were highly agree and happy with the implementation of hypermedia in physics learning.

Technology-Enabled Active Learning Simulations (TEALSim) is a pedagogic innovation in learning by utilizing multimedia in the form of interactive simulations through active learning. In Indonesia, the use of TEALSim is still very poor. This study aims to identify the influence of the use of TEALSim in the learning of material physics of particle wave dualism at Makassar State University. This research is a quasi experiment using Nonequivalent Control Group Design. Data sources were obtained from the final test in the form of the Force Concept Inventory (FCI) and the Mechanics Baseline Test (MBT). The sample is two classes who programed introductory courses in quantum physics in the physics department of Makassar State University. The first is physics education class B with 25 students as experiment class and the second is physics education class C with 30 students. Data analysis is done descriptively and inferentially. Based on the results of data analysis, it was obtained information that there were significant differences between the FCI test results of the experimental class and the control class, whereas there were no significant differences in the results of the MBT test for both classes. It can be concluded that there needs to be another method in the use of TEALSim in order to be able to improve conceptual understanding, analytical skills, and mathematical skills

Penelitian ini merupakan penelitian quasi eksperiment dengan desain posttest only none equivalent control group design. Penelitian ini bertujuan untuk mendeskripsikan keterampilan proses sains peserta didik serta untuk menganalisis perbedaan keterampilan proses sains peserta didik pada kelas eksperimen dan kelas kontrol. Penelitian ini dilaksanakan di SMA Negeri 2 Majene tahun akademik 2018/2019 dan mengambil XI MIPA sebagai sampel, yaitu kelas experimen XI MIPA 3 sebanyak 30 siswa dan kelas XI MIPA 5 sebanyak 32 siswa sebagai kelas kontrol. Pemilihan sampel dilakukan dengan purposive sampling. Pada kelas eksperimen diterapkan pembelajaran inkuiri terbimbing dan kelas kontrol pembelajaran dilaksanakan secara konvensional. Hasil tes keterampilan proses sains diperoleh skor rata-rata pada kelas eksperimen yaitu 18,133 dengan kategori sedang, sedangkan pada kelas kontrol skor rata-rata yaitu 7,061 dengan kategori sangat rendah. Hasil uji statistik menggunakan uji t diperoleh bahwa H1 diterima dan HO ditolak. Dengan demikian dapat disimpulkan bahwa terdapat perbedaan keterampilan proses sains antara peserta didik yang diajar dengan pembelajaran menggunakan model inkuiri terbimbing dengan yang diajar secara konvensional.