This research aims to develop a Problem Based Learning (PBL) based Effective Learning Strategy (ELS) module to improve the quality of learning and teaching skills. The ELS module is designed to provide systematic guidance to educators in implementing PBL in their learning. This study used a data analysis technique, namely a comparison test using SPSS software. The evaluation results show that this module provides a practical approach to improving teaching skills, focusing on setting up problem-based tasks and facilitating problem-solving oriented discussions. Based on the results of the study, it can be concluded that the development of coursebooks has a significant impact on improving student learning outcomes. Before the use of the textbook, the average score obtained was at a certain level of 74.98, but after the use of the textbook, there was a significant improvement in the learning outcomes with a significantly increased average score of 86.16.
Keywords: problem-based learning, quality of learning, teaching skills