CD Tesis
Pengembangan LKPD Berbasis Problem Based Learning Untuk Meningkatkan Kemampuan Pemecahan Masalah Dan Keterampilan Kolaboratif Peserta Didik Kelas XI Pada Materi Laju Reaksi
Chemistry is one of the subjects that has abstract material characteristics and is related to everyday life. Chemistry learning requires interesting learning, fosters creativity, student innovation, and is not monotonous. Teaching materials play a very important role in the learning process because they function as a tool to con-vey information to students. Therefore, it is essential to use high-quality teaching materials to achieve learning objectives optimally. Generally, the low problem-solving skills among students in Indonesia may be attributed to instructional ap-proaches that do not prioritize the development of problem-solving abilities. Thus, the selection of appropriate teaching materials and the development of a more problem-solving-oriented instructional approach could be a crucial step in enhanc-ing students' problem-solving skills in Indonesia. Furthermore, students need col-laborative skills to support the learning activities. Through collaborative skills, it is expected that students can actively contribute to problem-solving. This research aims to produce PBL-based student worksheets to enhance the problem-solving skills and collaborative skills of 11th-grade students in the Reaction Rate material.
The study uses the Research and Development (R&D) method with the ADDIE model, consisting of five phases: analysis, design, development, implemen-tation, and evaluation. Data collection techniques include interviews, student ques-tionnaires, validation sheets, user response questionnaires, collaboration skills observation sheets and assessment results from question instruments. Validation is assessed by three content experts. A small-scale trial is conducted using two meth-ods: one-on-one testing and user response. The one-on-one test involves three stu-dents with high, medium, and low abilities. User response assessment involves three teachers and 30 students from SMAN 8 Mandau, SMAN 5 Pinggir, and SMAN 1 Pinggir. The research design for the large-scale trial is a pre-experimental Pretest-Posttest Control Group design. Sample selection uses purposive sampling, resulting in one sample class, namely Class XI.2 at SMAN 5 Pinggir, consisting of 36 students.
The research results indicate that the developed student worksheets ob-tained an average expert content percentage of 89%, categorized as highly valid. One-on-one testing received feedback from students on components of the student worksheets that need improvement. User responses, from both teachers and stu-dents, achieved percentages of 88% and 91%, respectively, categorized as excel-lent. In the large-scale trial, pretest-posttest data on students' problem-solving skills and collaborative skills before and after using the student worksheets are obtained. Paired t-tests on collaborative skills and problem-solving skills data yielded a sig-nificance value of 0.000 (sig
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