ABCD of Intelligence and Behavior Implications for Education is the final product of the long journey. It demonstrates that intelligence is different from rational and irrational behaviors. It uses factors in the environment to create and use both behaviors to achieve its goal. The book classifies fn, and differentiates between T and t. The effects of Pre, fn, 2fn and t on behavior should be a primary importance to education, behavioral science and counselors. Some letters are changed e.g., E is now Pre. But the concepts remain essentially the same. Let us hope that ABCD of Intelligence and Behavior Implications for Education should do for the behavioral science and education what relativity and waves did for physics. Intelligence is heredity H (chromosomes and genes) as influenced by prenatal environmental factors Pre. If we knew the characteristics qualitatively and quantitatively of normal innate intelligence (H), we would assign it 100 percent. In the absence of abnormal H, any percentage below the 100 percent innate intelligence (H), would be attributed to Pre. Intelligence could be evaluated in the womb and immediately after birth. But we do not know the normal characteristics of H and cannot quantify them. Chromosomes and genes develop in the imperfect human body. The human body where H develops exists before and during pregnancy. We refer to it as prenatal factors in the environment Pre. H and Pre interact in the womb to form intelligence. If one knew intelligence and could test H without Pre that would be innate intelligence. In the absence of such a test, the result of the interaction between H and Pre should be tested. Current intelligence tests fail to meet these criteria. Therefore, I.Q. can never be a quotient of intelligence. Intelligence H+Pre uses factors FN and fn, and T and t to produce and use behaviors b+/- and B+/-. Intelligence produces and uses rational and irrational behaviors to achieve its goal. Behavior should not be equated with intelligence. The challenge to education is to discover how to arrange the fn and t to achieve maximum, meaningful intensity of interaction between intelligence (H+Pre) and factors in the environment (fn) using time (t) appropriately to achieve maximum result in the classroom. In other words there are three factors under discussion: 1) Intelligence (H+Pre) is a different entity. 2) Intelligence uses factors in the environment and time to produce behaviors. 3) Behaviors are the result of intellectual activities. Education should know the relationship between these and make the maximum use of them