John Barry Willett is an emeritus professor at Harvard University Graduate School of Education and a member of the National Academy of Education who specialized in the teaching, development and application of innovative quantitative methods in the social sciences.
Willett was born in 1947 in the city of Leeds, in the county of Yorkshire, England, and raised from the age of 10 in the nearby town of Harrogate. He attended Harrogate Grammar School. He received an Open Venning Exhibition to study physics, specializing in quantum mechanics, at Worcester College, Oxford University. He went up to Oxford in 1967, graduating with a degree in physics in 1970. In 1971, after a further year of study at Oxford, he earned a certificate in education, to become a teacher of physics and mathematics.
In 1972, Willett moved with his wife to Hong Kong where he taught high-school physics and mathematics at Hong Kong's Island School until 1978. From 1978 to 1980 he worked in the School of Education at Hong Kong University with in-service teachers of physics in schools in Hong Kong and Kowloon.