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All Journal Jurnal Inovasi Pendidikan Kimia Journal of Innovative Science Education
Prahasti Cynthia Hardiyanti, Prahasti Cynthia
Jurusan Kimia FMIPA Universitas Negeri Semarang Gedung D6 Lantai 2 Kampus Sekaran Gunungpati Semarang, 50229, Telp. (024)8508035
Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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KEEFEKTIFAN MODEL PROBLEM BASED LEARNING UNTUK MENINGKATKAN KETERAMPILAN PROSES SAINS SISWA Hardiyanti, Prahasti Cynthia; Wardani, Sri; Nurhayati, Sri
Jurnal Inovasi Pendidikan Kimia Vol 11, No 1 (2017): January 2017
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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Abstract

Penelitian ini merupakan penelitian eksperimen yang bertujuan mengetahui keefektifan model problem based learning untuk meningkatkan keterampilan proses sains pada materi kelarutan dan hasil kali kelarutan. Teknik sampling menggunakan cluster random sampling. Desain penelitian menggunakan pretest-posttest control group design. Variabel bebas adalah model problem based learning yang digunakan, sedangkan variabel terikat adalah keterampilan proses sains. Teknik pengumpulan data menggunakan metode dokumentasi, observasi, tes, dan angket. Analisis data menggunakan uji N-gain dan uji t, sedangkan angket dan lembar observasi dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa keterampilan proses sains kelas eksperimen lebih tinggi dari kelas kontrol. Hasil uji perbedaan rerata menunjukkan thitungketerampilan proses sains 5,54 lebih besar dari tkritis yaitu 1,66 sehingga keterampilan proses sains siswa kelas eksperimen lebih tinggi dari kelas kontrol. N-gain keterampilan proses sains kelas eksperimen adalah 0,71 pada kategori tinggi dan kelas kontrol adalah 0,52 pada kategori sedang. Berdasarkan hasil penelitian dapat disimpulkan bahwa model pembelajaran problem based learning efektif meningkatkan keterampilan proses sains siswa kelas XI SMA Negeri di  Semarang.
Efforts to Increase Mathematical Logical Intelligence Through Development of Student Worksheets Based on Problem Based Learning Hardiyanti, Prahasti Cynthia; Wardani, Sri; Kurniawan, Cepi
Journal of Innovative Science Education Vol 9 No 3 (2020): December 2020
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (539.462 KB) | DOI: 10.15294/jise.v9i1.36846

Abstract

Chemistry is a subject that is closely related to learning that requires students to be active in problem solving. Because of this, a worksheet development is needed to support chemistry learning activities. This study aims to develop a Student Based Worksheet (LKPD) based on Problem Based Learning (PBL) hydrolysis material to improve mathematical logical intelligence. The quality of LKPD is measured by the criteria of validity, effectiveness, and practicality in the learning process. The development model used in this study is a 3D model (define, design and develop). Data analysis techniques using qualitative and quantitative tests. The product development validation was carried out by the validator of media experts and material experts, while the trial was conducted by 36 students of class XI IPA 5. The results of the validator analysis stated that the quality of learning material was included in the excellent category with a percentage of 93.77% of the material experts and 94.46% of media experts. The effectiveness of LKPD indicated an increase in mathematical logical intelligence of students with the achievement of N-gain of 0.56 in the medium category and classical completeness of 86.11%. Student responses to the practicality of using LKPD showed results of 77.78% which included in the very good category and 22.22% included in the good category. Based on the results obtained, it can be concluded that LKPD fulfills valid, effective, practical criteria, and can improve mathematical logical intelligence.
Co-Authors A.A. Ketut Agung Cahyawan W Cepi Kurniawan SRI WARDANI