Picture book
In 1938, the American Library Association (ALA) began presenting annually the Caldecott Medal to the most distinguished children's book illustration published in the year. The Caldecott Medal was established as a sister award to the ALA's Newbery Medal, which was awarded to a children's books "for the most distinguished American children's book published the previous year" and presented annually beginning in 1922. During the mid-forties to early fifties, honorees included Marcia Brown, Barbara Cooney, Roger Duvoisin, Berta and Elmer Hader, Robert Lawson, Robert McCloskey, Dr. Seuss, Maurice Sendak, Ingri and Edgar Parin d'Aulaire, Leo Politi, Tasha Tudor, and Leonard Weisgard.
Newbery Medal
As Barbara Elleman explained in "The Newbery and Caldecott Awards", the original Newbery was based on votes by a selected jury of Children's Librarian Section officers. Books were first nominated by any librarian, then the jury voted for one favorite. Hendrik van Loon's non-fiction history book "The Story of Mankind" won with 163 votes out of 212. In 1924 the process was changed, and instead of using popular vote it was decided that a special award committee would be formed to select the winner. The award committee was made up of the Children's Librarian Section executive board, their book evaluation committee and three members at large. In 1929 it was changed again to the four officers, the chairs of the standing committees and the ex-president. Nominations were still taken from members at large.