The book strictly follows the competence-based learning approach that emphasizes mastery of concepts. It presents concepts and content through very interactive learner-centered activities set in the learner’s environment. The book involves the learner in the learning process through active participation and activities and uses a very simple language to communicate concepts and content clearly. It provides concise notes and numerous examples on each concept to enhance mastery as well as provide a practice exercise for each concept to give learners an opportunity to practice and assess their mastery of concepts.