Shapero was born in
Lynn, Massachusetts, on April 29, 1920. He and his family later moved to nearby
Newton. He learned to play the piano as a child, and for some years was a pianist in dance orchestras. With a friend, he founded the Hal Kenny Orchestra, a swing-era jazz band. He was more interested in classical music. In his teens some of his teachers included
Nicolas Slonimsky (editor of Baker's
Biographical Dictionary of Musicians) in 1936 and
Ernst Krenek in 1937. At 18 he entered
Harvard, where he became friends with
Leonard Bernstein and studied composition with
Walter Piston in 1938. Shapero was one of the first students at
Tanglewood following its founding in the 1940s. When
Igor Stravinsky was Norton Professor at Harvard in 1940, Shapero showed Stravinsky his
Nine-Minute Overture. Shapero hoped to get the Overture played at Tanglewood that summer, but Hindemith ordered that no student compositions would be played that season.
Aaron Copland hastily put together an orchestra to play student compositions, including Shapero's Overture. Shapero was awarded the
Rome Prize in 1941 for his
Nine-Minute Overture, which included a $1000 award.
World War II prevented him from taking advantage of the residency in
Italy the prize provided. At Harvard he held the
Naumberg and Paine Fellowships. After graduating in 1941, Shapero undertook further studies with
Nadia Boulanger at the Longy School of Music in 1942–43. While studying with her, Shapero was also in contact with Stravinsky, who was helpful in his critiques of Shapero's music. ==Postwar years==