The formula put forward by Blum in the United States in 1976 is Hs=f(e)+AcHs+B+LS, where Hs refers to health status, e refers to environment, AcHs refers to availability of medical and health facilities, b refers to biological factors, and LS refers to lifestyle.
The index system of population health should be divided from biological, psychological and social aspects, and can also be described by structure and function, and can also be divided into individual and group index systems from time sampling.
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In 1950s, Bloom was famous for his systematic theory of educational goal classification, and he wrote The Classification of Educational Goals. In 1960s, he put forward the theory of "human characteristics" and wrote "Human characteristics and school learning". In 1970s, he put forward the school teaching theory of "Mastering Learning", and wrote All Our Children Can Learn and Introduction to Mastering Learning Theory.
Bloom's theory of "human characteristics" and school teaching was once listed as "one of the most important educational research achievements" in the United States.
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