Active learning makes learning a dynamic and effective process. A study was conducted to develop and test 4Ws&H active learning model for teaching mathematics. Objectives of this book was to develop and test an active learning model for teaching mathematics and to explore the effect of this model on the academic achievement, critical thinking, learning engagement, cognitive development and mathematical motivation of different achievement level of students. The model was developed after thorough study of related literature. This book adopted quantitative research approach.