Development of Electronic Student Worksheets (E-Worksheets) Based on Problem-Based Learning to Train The Critical Thinking Abilities of Students on Acid-Base Topics

The purpose of this study is to develop a problem-based learning (PBL) editorial electronic student worksheet (E-Worksheet) that trains using liveworksheets of student critical thinking about acid base issues in terms of effectiveness, practicality and effectiveness. This study follows a research and development (R&D) approach using the ADDIE model, which consists of five phases: Analysis, Design, Development, Implementation, and Evaluation. This research was conducted at Senior High School 1 Krembung in class XI-2 with a class of 34 students. The results showed that the content validity and components of the E-Worksheet received a score of 3 and placed them in a good category. The practicality of the E-worksheet was based on related student activities in the first and second sessions, achieving a rate of 93.33% and 95.55% in the highly practical category. Furthermore, the practicality of students who answer 98.17% surveys is supported by very practical categories. The E-Worksheet effectiveness was carried out by assessing improvements in critical thinking skills based on student pretest and N-gain scores derived from post values. The results showed an improvement of 1 from 0.66 in the medium and high category. Data from pretest and postest results were then analyzed using the normality test and resulted in a significance of 0.621 or 0.231, resulting in a significance of > 0.05, so the data is distributed normally. Additionally, it was tested using a paired sample T test, which received a significance value of 0.000. Based on these results, we can draw the conclusion that E-worksheets may be feasible using liveworksheet-oriented problem-based learning to train students' critical thinking skills into acid-based problems.