Implementation of the REAKSI Learning Model on the Collaboration Skills of Chemistry Education Students

The problem of chemistry learning that often occurs is the discussion of macroscopic, submacroscopic, and symbolic materials, which is considered difficult by students. Therefore, collaboration skills are needed to make it easier for students to understand chemistry materials. The current learning model is mostly designed to encourage students' collaboration skills. The solution to this problem is to design a learning model that encourages student collaboration, namely, the REAKSI learning model based on the STEM approach. REAKSI represents Research Formulation (R), exploration (E), analysis (A), classification (K), synthesis (S), and implementation (I). This study aimed to implement a new learning model called the REAKSI learning model to improve students' collaboration skills. The novelty of this research is a new learning model that can be used as an innovation in 21st century learning, which is quantitative research using the lesson study method. The samples used were chemistry education students at the University of Riau, Sultan Syarif Kasim State Islamic University, and Riau Islamic University, who were selected using purposive sampling. Data were collected through observations using a Likert-scale questionnaire. Data analysis: The REAKSI learning model based on the STEM approach is more effective in developing collaboration skills from 77% to 90% with a high category. This effectiveness is obtained because the REAKSI learning model includes steps that direct students to engage in collaborative learning activities.