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Development of Problem-Based-Learning (PBL)-Oriented Electronic Student Worksheets (e-Worksheet) to Improve Critical Thinking Skills of Class XI Senior High School Students on Factors that Influence Rate of Chemical Reactions Material

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Education system changes from time to time, and with these changes, the existing curriculum in Indonesia also continues to undergo several curriculum updates. The Merdeka Curriculum is the answer to the high level of competition that occurs in the 21st century. Factors that influence the rate of chemical reactions are one of the materials in chemistry phase F of the Merdeka curriculum, which has abstract characteristics and requires experimentation. Based on these characteristics, the problem-based-learning (PBL) learning model is suitable for use and can improve students’ critical thinking skills. This research aims to determine the feasibility of developing a PBL-oriented student e-worksheet to improve critical thinking skills on factors that influence reaction rates. The method used in this research is R&D with a 4D model. The results obtained are that the student e-worksheet developed is feasible because the content and construct validity results obtained in mode 5 with a very valid category, then the practicality results obtained a response questionnaire score of 98.44%, which was supported by the results of the student activity sheets, and the effectiveness was obtained. From the data from the pretest and posttest results, which were analyzed using the SPSS Paired Sample t-Test, the results showed that there was an increase in students’ critical thinking skills, namely with a significance value of 0.00.

Development of Student E-Worksheet Based on PBL (Problem Based Learning) to Practice Metacognitive Abilities of High School Student on Reaction Rate Material

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Developments in the 21st century is so rapid that innovation in various fields is required one of which is education. Through the implementation of the 2013 curriculum, the metacognitive abilities needed in the 21st century were train. The Problem Based Learning (PBL) model can support students to develop their metacognitive abilities. The rate of reaction as one of the subjects that are difficult to understand can be taught through the PBL learning model. The aim of this study is to develop a Student E-Worksheet based on Problem Based Learning to train students metacognitive abilities on reaction rate material. The Student E-Worksheet development model in this study uses a 4D model. The development of Student E-Worksheet was declared feasible to train student metacognitive abilities. The results of content validity of 94.81% and construct validity of 96.97%. Then the results of practical of observing student activities and questionnaire with a value of 96.37%. The effectiveness of the Student E-Worksheet is seen from the pretest and posttest values ​​which were analyzed using the SPSS Paired Sample t-Test test, a significance value of 0.000 was obtained.