Like most ideas that resonate with the spirit of the times, Negro History Week proved to be more dynamic than Woodson or the Association could control. By the 1930s, Woodson complained about the intellectual charlatans, black and white, popping up everywhere seeking to take advantage of the public interest in black history. He warned teachers not to invite speakers who had less knowledge than the students themselves. Increasingly publishing houses that had previously ignored black topics and authors rushed to put books on the market and in the schools. Instant experts appeared everywhere, and non-scholarly works appeared from “mushroom presses.” In America, nothing popular escapes either commercialization or eventual trivialization, and so Woodson, the constant reformer, had his hands full in promoting celebrations worthy of the people who had made the history.