Sir Usman Khan is an experienced and certified Biology instructor who believes that Biology is not just a subject to memorize—it is a subject to understand and explore. With extensive teaching experience at O-Level, IGCSE, A-Level, and MDCAT levels, he has helped thousands of students build strong concepts and achieve excellent academic results. His teaching approach focuses on clear concepts, exam-oriented preparation, problem-solving, and making difficult topics easy to understand. With experience teaching students from Cambridge International, Pearson Edexcel, AQA, IB and Federal Board, he understands the different requirements of each examination system. His goal is to make Biology easier, more interesting, and more rewarding for every student.