This study aims to determine the improvement of students' conceptual understanding using guided inquiry models on acid-base titration material. This study used a one-group pretest-posttest design, using one group of subjects, conducted at SMA PGRI Bolo-Bima in class XI for the 2020/2021 school year. The results showed that the percentage of student completeness at the pretest was 20%, meaning that only 4 out of 20 students completed. While the post-test results are inversely proportional to the pretest results with the percentage of student completeness of 100% meaning that all 20 students are complete. The results of the analysis of student activity data were obtained through observations by two observers during learning activities, the percentage of the frequency of student activity that was most dominant performed by students was carrying out investigations (13.9%), listening to / paying attention to teacher explanations (10.5%), and conclusions. investigation results (9.20%). As well as the results of student responses obtained an overall average of 90% of students gave positive responses and as many as 10% gave negative responses. Based on the results obtained in this study, it can be concluded that the use of the guided inquiry learning model used can improve students' conceptual understanding of acid-base titration material. Keywords: Guided Inquiry and Concept Understanding

Research has been carried out entitled the application of the Make A Match cooperative learning model to increase the activity and learning achievement of physics class VII students of SMPN 2 Wera. This research is classroom action research (PTK) which consists of 2 cycles. The purpose of this study was to increase the activity and learning achievement of class VII students of SMPN 2 Wera. The results of this study were analyzed with qualitative data while the average value of student learning activities in the first cycle was 12.32 in the fairly active category and the average value in the second cycle was 14.29 in the active category, which means that there was an increase in learning activities. students from cycle I to cycle II, as well as analyzing with quantitative data which resulted in the average value of student achievement in cycle I was 66.32 with 73.52% classical completeness and in cycle II the class average score increased to 72, 21 with classical completeness of 94.12%, which means that classical completeness has been achieved and student learning achievement has increased. From the results of the study, it can be concluded that using the Make A Match cooperative learning model can increase the activity and learning achievement of class VII students of SMPN 2 Wera.

Penelitian ini bertujuan untuk mengetahui pengaruh ukuran partikel arang tempurung kelapa dengan asam teraktivasi terhadap reduksi peroksida minyak goreng bekas. dalam hal meningkatkan tingkat penyerapan, digunakan arang aktif asam. Parameter penelitian adalah pengaruh ukuran serbuk arang dan konsentrasi HCl terhadap absorbansi untuk mereduksi peroksida minyak goreng bekas. Berdasarkan hasil penelitian, ukuran serbuk arang berpengaruh terhadap daya serap untuk mereduksi peroksida, arang penyerap dengan ukuran 80 mesh lebih baik dalam mereduksi peroksida menggunakan coocing oil. Konsentrasi larutan bahan juga mempengaruhi penyerapan karbon, semakin besar konsentrasi maka penyerapan arang aktivator semakin baik. Pada konsentrasi 1,5 M arang dapat mereduksi hingga 60,11%. Hal ini menunjukkan bahwa aktivasi serbuk arang tempurung kelapa yang telah divariasikan ukuran dan konsentrasi larutan yang digunakan sebagai aktivator peroksida dapat mereduksi minyak goreng bekas.

Penelitian ini bertujuan untuk meningkatkan pemahaman konsep siswa kelas VII SMPN 02 Wera menggunakan model Project Based Learning pada materi pemanfaatan sumber energi alternatif. hasil tes pemahaman konsep aspek pengetahuan rata-rata pre-test 57.95 meningkat saat post-test 84.45 dengan n-gain score 0,93. Berdasarkan hasil penelitian ini, dapat disimpulkan bahwa perangkat dengan pembelajaran berbasis Project Based Learning layak digunakan untuk meningkatkan pemahaman konsep siswa kelas VII SMPN 02 Wera pada materi pemanfaatan sumber energi alternatif.