This research aims to describe the effectiveness of the POGIL model to increase learning motivation and mastery of the concept of buffer solutions students. The research method used is quasi-experimentation with pretest-postest control group design. Sampling is done by random sampling cluster technique and obtained class XI IPA 3 as an experimental class and class XI IPA 4 as a control class. The effectiveness of the POGIL model was analyzed using the n-Gain two-average difference test to learning motivation and mastery of concepts learners' between experimental class and control class. The results of the analysis of the study data showed that the average value of n-Gain motivation learning of learners in the experimental class was greater than the control class, as well as the average grade of n-Gain mastery of concept of the experimental class was greater than the control class. The results of the influence test analysis also showed that increased learning motivation and mastery of the concept of buffer solution students were influenced by the POGIL model. It can be understood that learning with the POGIL model is effective to increase learning motivation and mastery of the concept of buffer  solution students.

The Effect of Socioscientific Issues in Improving Students' Creative Attitudes Ability on Electrolyte and Non-Electrolyte Solutions Topics. The research was aimed to describe the effect of socio-scientific issue in improving students' creative attitudes ability on electrolyte and non-electrolyte solutions. The populations of this research were all students of X MIA at SMA Bandar Lampung. This research used a quasi-experiment with Pretest-Posttest Control Group Design, cluster random sampling technique was used in determining the samples, thus X MIA1 was chosen as an experiment class and X MIA2 was a control class. The effect of socio-scientific issues was analyzed by the difference of two average test and effect size test. The results of the research showed that students' creative attitudes in experimental class were higher than the control class. The conclution of this research was the socio-scientific issues learning has the 'large' and 'positive' effects in improving students' creative attitudes ability on electrolyte and nonelectrolyte solutions topics . . Keywords: creative attitudes, socio-scientific issue learning, electrolyte and nonelectrolyte solutionsAbstrak: Pengaruh Isu Sosiosaintifik dalam Meningkatkan Sikap Kreatif Siswa pada Materi Larutan Elektrolit dan Non-Elektrolit. Penelitian ini bertujuan untuk mendeskripsikan pengaruh pembelajaran berbasis isu sosiosaintifik dalam meningkatkan sikap kreatif siswa pada materi larutan elektrolit dan non elektrolit. Populasi dalam penelitian ini adalah seluruh siswa kelas X MIA di SMA Bandar Lampung. Metode dalam penelitian ini adalah kuasi experimen dengan Pretest Posttest Control Group Design, pengambilan sampel dipilih dengan teknik cluster random sampling, didapatkan kelas X MIA 1 sebagai kelas eksperimen dan X MIA 2 sebagai kelas kontrol. Pengaruh pembelajaran berbasis isu sosiosaintifik dianalisis menggunakan uji perbedaan dua ratarata dan uji effect size. Hasil penelitian menunjukkan bahwa sikap kreatif siswa pada kelas eksperimen lebih tinggi dari pada kelas kontrol. Kesimpulan dalam penelitian ini yaitu pembelajaran berbasis isu sosiosaintifik berpengaruh besar dan positif dalam meningkatkan sikap kreatif siswa pada materi larutan elektrolit dan non-elektrolit. .Kata kunci : sikap kreatif, pembelajaran isu sosiosaintifik, larutan elektrolit dan nonelektrolit

The Effect of Socio-Scientific Issues in Improving Science Process Skill on Electrolyte and Non-Electrolyte Solutions Topics. This research was aimed to describe the effect of socio-scientific issues on improving science process skills. The method used was quasi-experiment with pretest-postest control group design. The samples were the students from one of senior high school in Bandar Lampung, X MIA 4 as experiment class and X MIA 3 as control class, cluster random sampling technique was used in determining the samples. The effect of socio-scientific issues was analyzed using the difference between two average tests and the effect size test. The results of the research show that the science process skills of students in the experiment class were higher than in the control class. The effect size of socio-scientific issues as a "large" category. In conclusion, socioscientific issues had large and positive effects on improving students' science process skills on electrolyte and non-electrolyte solutions topics.Abstrak:Pengaruh Isu Sosiosaintifik dalam Meningkatkan Keterampilan Proses Sains pada Materi Larutan Elektrolit dan Non-Elektrolit. Penelitian ini bertujuan untuk mendeskripsikan pengaruh pembelajaran berbasis isu sosiosaintifik dalam meningkatkan keterampilan proses sains siswa. Penelitian ini menggunakan metode quasi eksperiment dengan desain penelitian pretest-posttest control group. Pengambilan sampel dilakukan dengan cluster random sampling didapatkan kelas X MIA 4 sebagai kelas eksperimen dan X MIA 3 sebagai kelas kontrol. Pengaruh pembelajaran berbasis isu sosiosaintifik dianalisis menggunakan uji perbedaan dua rata-rata dan uji effect size. Hasil penelitian menunjukkan keterampilan proses sains siswa pada kelas eksperimen lebih tinggi daripada kelas kontrol. Ukuran pengaruh pembelajaran berbasis isu sosiosaintifik berkategori "besar". Kesimpulannya, pembelajaran berbasis isu sosiosaintifik berpengaruh besar dan positif dalam meningkatkan keterampilan proses sains siswa pada materi larutan elektrolit dan non elektrolit.Kata Kunci: keterampilan proses sains, isu sosiosaintifik, larutan elektrolit dan non-elektrolit.

This study aims to develop an android-based color sensor for chemistry practicum and demonstration in front of the class using colored chemicals. The materials used are cardboard boxes, laptops as light sources, test tubes and smartphones for testing the Lambert-Beer experiment and titration apparatus such as oxalic acid, NaOH, indicator, stative, clamps prepared for the acid base experiment. The relationship of concentration versus absorbance was observed. The results show that this application has a very high accuracy with a r 2 = 0.999. This application is highly recommended to be applied in school chemistry teaching and practicum and is very useful to help students with color vision limitations.

One of the abilities and qualifications of prospective teachers is the result of their participation in the School Field Introduction (PLP) program. PLP is expected to be one of the efforts to prepare competent and prospective teacher candidates in the world of work. Field experience in teacher education programs helps students grow and develop as teachers. Field experience, an important component of teacher preparation. PLP aims to strengthen students' academic abilities in education and learning through activities in schools. The method used is descriptive qualitative with interview instruments and drawing conclusions. Sources of data are student teacher candidates who do PLP in schools in Bandar Lampung. The subjects in the study were student teacher candidates who held PLP in schools in Bandar Lampung. The research subject selection technique used snowball sampling technique. The results of this study, the PLP activity planning indicators are carried out by procedurally making activity agendas in the form of circulars addressed to students, heads of study programs and heads of departments, collaborating with the Education Office, determining partner schools, placing placements, preparing orientation and debriefing materials. implementation indicators during the Coronavirus Disease (Covid-19) emergency period, teaching exercises and extracurricular assistance cannot be optimal because most of the implementation is online. And the indicators for the assessment of components and weights of the PLP assessment consist of: 10% attendance on campus and schools and 40% Oral Examination by PLP supervisors.