This book covers the requirements of the Standard Three Tanzanian Syllabus of Geography and Environmental Studies of 2023. It has put into consideration the main objectives of education in Tanzania and the objectives and competences of primary education. It has sufficient photographs and illustrations to help the pupils understand easily and enjoy learning. Also, it has many exercises which will help pupils to practice what they learn and test themselves thoroughly. Also it has activities that aim to help pupils to develop skills such as communication, collaboration and teamwork, creativity, critical thinking and problem solving. The book uses a clear, engaging and simple language that is appropriate to the learners' level. It contains competence based exercises and test papers at the end of each chapter and the end of the book, respectively. The exercises and test papers are aimed at helping teachers, parents and guardians to test pupils on all topics covered in the book as they prepare for their final examinations.