Modules are teaching materials that are designed to be independently studied by learning participants. This study aims to determine the eligibility of biomolecular e-module that have been developed with discovery learning models on protein material. This study uses the ADDIE development model (Analyze, Design, Develop, Implementation, Evaluation), but the research only carried out until the development stage. E-module that have been developed are validated by 3 expert lecturers. The instrument used in the study was a questionnaire on National Higher Education Standards (SNPT) consisting of content, language, presentation, and graphic eligibility. The results showed that the biomolecular e-module that had been developed with the discovery learning model on protein material was valid for college students to use.
Hasil belajar yang optimal dalam pembelajaran kimia akan dicapai jika ada penekanan aktivitas siswa baik secara fisik, mental, intelektual, maupun emosional. Salah satu metode yang dapat memberdayakan peserta didik adalah pendekatan kontekstual. Penelitian ini bertujuan untuk melihat keefektifan pembelajaran kontekstual dalam merangsang keaktifan belajar siswa dan melihat keefektifan pembelajaran kontekstual terhadap hasil belajar siswa. Rancangan penelitian yang digunakan adalah Pretes-Postest Control Group Design. Dua kelas digunakan sampel penelitian yang diambil dari 5 kelas populasi (kelas XI SMA Swasta Methodist-1 Medan) secara acak sederhana (Simple Random Sampling). Lembar observasi digunakan untuk memperoleh data aktivitas belajar siswa. Sementara itu, tes hasil belajar digunakan untuk mengukur keefektifan pembelajaran kontekstual ditinjau dari hasil belajar siswa. Semua instrumen telah divalidasi sebelumnya. Hasil analisis data aktivitas belajar siswa diperoleh skor rata-rata aktivitas belajar siswa pada kelas eksperimen sebesar 76,14 dan 56,53 pada kelas kontrol. Sementara itu, rata-rata postes untuk kelas eksperimen lebih tinggi (88,04) lebih tinggi dari kelas kontrol sebesar 81,79 dengan selisih 6,25. Hasil ini menunjukkan bahwa pembelajaran kontekstual efektif dalam merangsang keaktifan belajar dan hasil belajar siswa.
This study aims to determine the feasibility of teaching materials oriented critical thinking ability grade XI SMA developed. This research includes research and development with 3D development model (define, design and develop). The teaching materials developed were validated based on aspects of material feasibility, language and media by experts using validation sheets in accordance with BSNP standards and then the validated teachng materials were distributed to two teachers and grade XI students at Sultan Agung Private High School and SMAN 1 Pematangsiantar to find out the response of teachers and students using questionnaires. The results of the study found that expert validation of teaching materials developed has an average score of 4.17 in terms of content feasibility, 4.20 for the aspect of presentation feasibility, 4.33 for the linguistic aspect and 4.19 from the aspect of graphation. While students' response to critical thinking ability-oriented module teaching materials had average scores of 3.80 and 3.82 and teacher responses averaged a score of 4.27, judging by interest indicators, material indicators and language indicators. These results show that the critical thinking ability-oriented teaching materials developed have met valid and good criteria for use. Keywords: Teaching materials, Critical yhinking skills, Chemical equilibrium, 3D models
Sarangbanua plant, known as Clerodendrumfragrans Vent Willd, is a division of the Verbanaceae family found in Simalungun district of Indonesia, which is traditionally used as medicinal plants. The antioxidant and antibacterial activities of the C. fragrans leave extract was prepared by dissolving it in non-polar to polar solvents and treated by DPPH (1,1diphenyl-2-picrylhydrazin) and diffusion methods. The results showed that the ethanol (polar) extract of the C. fragrans leaves had the highest antioxidant activity than ethyl acetate (semi-polar) and n-hexane (non-polar) extracts, which had IC 50 values of 22.37 ppm, 27.26 ppm, and 88.77 ppm respectively. Vitamin C as a positive controlled with the IC 50 value of 20.18 ppm. Furthermore, the ethyl acetate (semi-polar) extract of the C. fragrans leaves had the greatest inhibition value on Gram-positive bacteria of S. aureus (90.0%)with inhibitory zones of 11.25 ± 0.2 mm, meanwhile the n-hexane (non-polar) extract had the greatest inhibition against Gram-negative bacteria of the E.coli(77.21%)with inhibitory zones of 10.5±0.3 mm.
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