The study aimed to find out the science process skills and its implementation in the process of science learning evaluation in the schools. The studied aspects in the study consisted of the nature of science process skills, types of science process skills, assessment techniques for science process skills, and the assessment implementation of science process skills in learning in the schools. The research used a literature study containing relevant theories and further elaborated and its implementation in science learning in the schools. The study emphasized that science process skills were closely related to science learning and prioritize the overall assessment following the nature of science, such as product, process, and attitude dimensions. Those were covered in basic and integrated process skills. The most possible evaluation technique in measuring the science process skills was by observation or performance and written questions following the indicators of science process skills.

AbstrakPenelitian ini bertujuan untuk menganalisis: (1) kelayakan media pembelajaran berbantuan komputer berbasis problem based learning (PBL) pada materi Pencemaran Lingkungan untuk peserta didik SMA kelas X, dan (2) kefektifan media pembelajaran untuk meningkatkan kemampuan berpikir kritis (critical thinking skill, CTS) peserta didik kelas X SMA Negeri 5 Kota Magelang. Penelitian ini termasuk penelitian pengembangan yang diadaptasi dari model ADDIE meliputi analyze, design, develop, implement, dan evaluate. Produk divalidasi oleh ahli materi, ahli media, pendidik Biologi, dan teman sejawat. Subjek coba pada penelitian ini adalah peserta didik kelas X SMA Negeri 5 Magelang. Pengumpulan data menggunakan angket, lembar observasi, dan tes kemampuan berpikir kritis. Kelayakan media pembelajaran berdasarkan penilaian validator dan peserta didik termasuk dalam kategori baik. Media pembelajaran terbukti efektif untuk meningkatkan kemampuan berpikir kritis peserta didik yang ditunjukkan oleh nilai signifikansi sebesar 0,00. Sehubungan dengan itu media pembelajaran berbantuan komputer berbasis PBL layak digunakan dan efektif untuk meningkatkan kemampuan berpikir kritis peserta didik. Kata kunci: Media pembelajaran berbantuan komputer, PBL, CTS EFECTIVENESS OF COMPUTER-ASSISTED LEARNING MEDIA BASED PBL FOR IMPROVING THE STUDENST CTS Abstract This study aims to investigate: (1) the feasibility of computer-assisted learning media based problem based learning (PBL) on Environmental Pollution materials for high school students of class X, and (2) the effectiveness of instructional media for improving of critical thinking skill (CTS

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This article is intended for students of science education, science teachers and observers of science education. The article aims to discuss about authentic assessment in science teaching in schools. In addition, this article is associated with the implementation of the curriculum of 2013 in schools. Aspects reviewed in the article include: the concepts of authentic assessment, assessment in the curriculum of 2013, procedures of authentic assessment, and the application of authentic assessment in science learning. Readers after reading this article are expected to have an understanding of the concepts of authentic assessment, assessment in the curriculum of 2013, procedures in authentic assessment, and the application of an assessment of authentic in science learning.