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From www.komicwerks.com :
"On a zero budget, (Byron Preiss) produced THE BLOCK, the tale of two inner-city brothers who choose to walk different paths, which was distributed citywide and met with exceptional success with both educators and students (some classes colored the panels, others read it aloud, and one even transformed the story into a rock opera). Preiss promoted it from New York City to Atlanta, achieving solid student acceptance and continual praise from all who saw and used it, right up to the majors at Sesame Street. The comic premiered in the summer of 1970, a year before the much-heralded Spider-Man and Green Lantern-Green Arrow drug mags. " - Read the Full Artice