Through the three units, the book aims at exploring the historical perspective of organized classroom approaches; depicting the transition of classroom approaches from traditionalism to modernity; reflecting on paradigm shift, and the application of John Kotter's eight-step process of successful change to the contemporary educational system. Each of the three units comprises an introduction part, a main body, a conclusion part, a 'brush up' part containing a set of ten questions including six objective type questions; three short answer type questions and one essay type question, and references. Creative infographics to foster illustration and perception of the readers, and precise biographies of psychologists/ educationalists, who contributed to the field of classroom designing adds to the value of the book. It is beneficial for teacher education courses (B.Ed and M.Ed), as well as for M.Phil and Ph.D scholars, Course Designers and Curriculum Developers cutting across disciplines