Blithe to Stalin, Chagall sent a reckless letter in 1937 to his art teacher in Vitebsk that probably cost the old man his life at the hands of the secret police.

ECONOMIST: Marc Chagall

The briefing also presented the attached letter to the Loudoun School Board by Mary Addi, a former teacher in a Gulen school in Cleveland, Ohio.

CENTERFORSECURITYPOLICY: Center For Security Policy

In a list attached to a letter to Congress, the National Educators Association wrote, "Teach for America does not include a sufficiently rigorous teacher preparation program, nor does it yield retention rates that warrant a federal investment in the program, " two points often cited by opponents of the program.

CNN: Unlikely teachers find purpose in the classroom