Benjamin Bloom was born on 21 February 1913 in Pennsylvania. He was a diminutive man at 5 ft 5 inches but the aura around him made people stand and take notice. His conversations were rich with knowledge and information. Benjamin and Sophie Bloom had two sons, David and Jonathan.
When Bloom worked with Ralf W. Tyler, his mentor at University of Chicago, he focused on the development of specifications through which educational objectives could be organized based on their cognitive complexity.