[post_page_title]Big black board[/post_page_title]
In today’s college courses, professors are able to use Powerpoint presentations to easily explain facts and equations to their students.
Back in the day, however, teachers needed to take advantage of massive black boards and chalk to be able to get their lessons across to their pupils. This incredible picture shows the ladders and man power that used to be necessary to teach an advanced math class. Just imagine how much chalk these guys were able to blow through in a semester!
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