Former cram school teacher keeps legacy of Hagoromo chalk - The Korea Times

POCHEON, Gyeonggi Province - For many professors and teachers, especially teaching mathematics, there's a chalk brand which is at the top of the chalk world - Hagoromo chalk. Though it is priced three to four times higher than other chalk brands, renowned mathematicians at prestigious universities such as Columbia, Cornell and Stanford have described how softly the chalk flows on the board, how visible its colors are and how strong it is on their blogs or clips. Some professors proudly show how many boxes of Hagoromo chalk they kept in their "treasure boxes."

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