U. Azizah, H. Nasrudin
Thinking skill is important for students as it is the foundation for enhancing the mastery of concepts needed in the 21 st century. Thinking skills that empowered in learning focuses on how students participate in solving problems. This research aims to develop chemistry instructional materials based on Cooperative Group Investigation (CGI) to empower thinking skills on colloidal system topic. The feasibility of chemistry instructional materials is evaluated based on its validity and practicality. The design of this research was four-D-model, consist of Define, Design, Develop, and Disseminate. Data of this research was analyzed by quantitative descriptive. The result of this research include: (1) The instructional materials that were developed which consist of lesson plan, students' book, worksheets, assessment, and power point media; (2) The instructional materials developed were valid with good category in construct, content, language, empirical validity, and contain principles of cooperative group investigation; (3) The teacher implemented the lesson plan well, the increased students activities were indicated by doing investigation, analyzed the result of investigation and presentation of final product that are empowering students' thinking skills. Based on the results of the research, the instructional materials of colloidal system topic can empower students' thinking skills. © Published under licence by IOP Publishing Ltd.
Chemistry Department, Universitas Negeri Surabaya, Surabaya, Indonesia
