Conversation so far:
What happened in the early years with Norman Rockwell?
Norman Rockwell went on to the National Academy of Design and finally to the Art Students League.
Did Norman Rockwell go to college?
When did Norman Rockwell start painting in the early years?
At Art Students League, Norman Rockwell was taught by Thomas Fogarty, George Bridgman, and Frank Vincent DuMond; his early works were produced for St. Nicholas Magazine.
What other paintings is Norman Rockwell famous for in his early years?
Norman Rockwell's first major breakthrough came at age 18 with his first book illustration for Carl H. Claudy's Tell Me Why: Stories about Mother Nature.
What else has Norman Rockwell done in his early years besides his first book illustration?
At 19, Norman Rockwell became the art editor for Boys' Life, published by the Boy Scouts of America.

Question: How long did he work with the boy scouts?
Self-contained rewrite: How long did Norman Rockwell work with the Boy Scouts of America?