This book meets the requirements of the Tanzania Syllabus for Standard One Healthcare and Environment of 2023. It has plenty of photos and illustrations to help the pupils understand easily and enjoy reading. It has many interesting activities to engage the pupils and help them practise and recall what they have learnt. We believe that this book will provide the pupils with all the required knowledge in Healthcare and Environment and give them a strong foundation on important aspects of science, healthcare and environment. The book will also provide guidance to teachers and parents in teaching and testing pupils.