This study aimed to develop and determine the feasibility of an electronic worksheet based on Research Oriented Collaborative Inquiry Learning in a course on chemical equilibrium. The development model of this research was Research and Development. It follows the 4D model by Thiagarajan. The 4D development model consists of four research and development steps: define, design, develop and disseminate. The instruments in this study were questionnaires used to obtain input data for products and quantitative scores as the value of media feasibility. The results showed that the components of the e-worksheet on the aspects of the materials, learning, visual display, and software engineering were suitable for use by students. The percentage of assessment by chemistry teachers was 92.50%, peer reviewers were 90%, and students’ rating was 87%. Therefore, the electronic worksheet based on Research Oriented Collaborative Inquiry Learning (REORCILEA) is worthy of being used as a learning medium in the course on chemical equilibrium to improve scientific argumentation skills. The electronic worksheet has the advantage of being more practical and effective in learning.
Keywords: electronic worksheet, collaborative inquiry learning, chemical equilibrium