This study aims to develop learning devices, especially in the evaluation section of science learning in junior high school, which in turn after being implemented in the classroom is expected to develop 21st century skills of students. In particular, this study aims to, 1) identify science learning evaluation tools made by teachers so that they obtain a clear picture of the profile of the evaluation tool, 2) develop a junior high school science learning evaluation tool that supports 21st century skills. This research includes development research in four stages, namely: decide, design, develop, and evaluate. The results of this study indicate that the tools developed by the teacher are in complete category, the learning objectives are clear, although the stages in part still need to be improved. Learning evaluation instruments developed by the teacher have met the principles of assessment, the presentation is in accordance with the curriculum, the sentence in the question is quite communicative, uses good and correct language and does not cause multiple interpretations. However, the majority of questions made by teachers still measure low-level thinking skills. This is because teachers have not been trained in developing questions that measure high-level thinking skills. An evaluation tool that was then developed together with the teacher was intended to perfect the shortcomings of the previous evaluation toolKeywords: 21st Century Skills, Learning Evaluation Tools, Middle School Science

This study aims to development of chemical learning material based PBL to improve metacognition skills of students on the material of electrolyte and nonelectrolyte solutions. The type of research used is Research and Development (R & D) with the modification of 4D model into 3D which consists of define, design and develop. The results showed that the average score of the feasibility of learning materials of 3.18 with medium category, The average score of teacher response and the response of learners is 3.58 with the practical category. The effectiveness data of learning materilas based PBL was obtained from N-Gain metacognition skill score of 0.51 in the medium category, meaning that chemical learning materials based PBL is effective to improve metacognition skills on the topic of electrolyte and nonelectrolyte solutions. Keyword: Chemical learning material, problem based learning, metacognitive skills.

Penelitian ini bertujuan untuk mengetahui efektivitas model blended learning untuk meningkatkan kemampuan berpikir kritis peserta didik pada mata pelajaran kimia dengan materi pokok struktur atom. Penelitian ini dilakukan di SMA Nahdlatul Wathan Mataram, NTB. Metode penelitian menggunakan quasi eksperimen dengan rancangan One Group Pretest Posttest Design. Sampel penelitian berjumlah 35 orang kelas X yang dipilih dengan teknik purposive sampling. Data berpikir kritis peserta didik diperoleh melalui tes dan dianalisis dengan rubrik berpikir kritis. Hasil analisis data menunjukkan bahwa nilai berpikir kritis yang diperoleh 83,35 dengan kategori sangat kritis. Hasil penelitian ini menunjukkan bahwa model blended learning efektif untuk meningkatkan kemampuan berpikir kritis peserta didik pada materi pokok struktur atom

Penelitian ini bertujuan untuk mengetahui pengaruh aplikasi multimedia berbasis green chemistry terhadap penguasaan konsep kimia siswa. Jenis penelitian ini adalah kuasi-eksperimen dilaksanakan dengan desain nonequivalent control group design. Penelitian ini dilakukan di salah satu satu sekolah menengah atas di Lombok Indonesia dengan melibatkan kelompok kontrol dan eksperimen. Pretest dan posttest diberikan oleh peneliti untuk menguji penguasaan konsep siswa pada materi kimia. Validitas, reliabilitas, dan tingkat kesukaran soal diuji menggunakan Rasch Model. Analisis statistik yang digunakan adalah uji prasyarat analisis data, dan uji hipotesis dengan uj t (Independent samples t-test) dengan bantuan SPSS 20 for windows. Hasil penelitian menunjukkan bahwa hasil belajar di kelas eksperimen lebih tinggi daripada di kelas kontrol. Secara statistik dapat dilihat bahwa pengujian hasil belajar menggunakan independent sample t-test menunjukkan t = 0,002 <α = 0,05. Kesimpulan dari penelitian ini menunjukkan bahwa multimedia interaktif berbasis green chemistry berpengaruh terhadap penguasaan konsep siswa.

The research aims to produce a valid, practical and effective chemistry learning devices based on a blended learning model to improve student critical thinking skills. The 4D development model was applied in this study. Testing of learning devices and tests of critical thinking skills are carried out on the tenth-grade students at high schools in the city of Mataram, West Nusa Tenggara, Indonesia. The one group pretest-posttest design was applied as a research design. The results showed that the validity of the developed chemical learning devices based on the blended learning model had an average value of syllabus, lesson plan, teaching materials, and critical thinking instruments were 82%, 86%, 72% and 70%, respectively. The practicality of the learning devices is tested through a blended learning processes. The chemistry learning devices have a practical criteria with a scoring percentage of 78%. Furthermore, the chemistry learning devices are effective in promoting critical thinking skills. The inprovement of students’ critical thinking can be seen from the increasing of their score from 55.3 to 82.2. In conclusion, the developed chemistry learning devices based on the blended learning model are valid, practical and effective criteria, and its applicable to promote students’ critical thinking skills.