. . . . "An investment in knowledge the first dozen years of the National Science Foundation's summer institutes programs to improve secondary school science and mathematics teaching, 1954-1965"@en . "An investment in knowledge the first dozen years of the National Science Foundation's summer institutes programs to improve secondary school science and mathematics teaching, 1954-1965" . . . . . . . . "An investment in knowledge : the first dozen years of the National Science Foundation's summer institutes programs to improve secondary school science and mathematics teaching, 1954-1965" . . . . . . . . "An investment in knowledge : The first dozen years of the National Science Foundation's summer institutes programs to improve secondary school science and mathematics teaching, 1954-1965" . . . "Sciences Étude et enseignement (Secondaire) États-Unis." . . "EE.UU." . .