From the Ridgefield CT Press:
“The reason blackboards lasted so long in the classroom,” Josh Smith told the school board, “is because every day when you walked in, you knew that chalk was going to work.”
http://www.acorn-online.com/joomla15/index.php?option=com_content&view=article&id=20848:with-over-3000-pieces-of-equipment-schools-tech-department-seeks-10-budget-increase&catid=46:rfd-local&Itemid=778
