The most efficient and effective way of teaching abstract Chemistry concepts to the 21st century student is by embracing technology to deliver the content. Programmed Instruction is one such way in which computer software is used to deliver material in small chunks, in a logical sequence, at a pace solely dictated by the learner, who has to be successful in understanding simple concepts before they can proceed to more complex ones. A question is paused at the tail end of each frame, which must be correctly answered for the successive material to be accessible. By virtue of being a totally student's centred instructional strategy that provides immediate feedback, what other way would guarantee maximum achievement? This book is a product of empirical research work, which was done in the Kenyan High School setting. Enjoy your readership.