Chalk It is formed in the sea by sub-microscopic plankton, which fall to the sea floor and are then consolidated and compressed during diagenesis into chalk rock. Most people first encounter the word "chalk" in school where it refers to blackboard chalk, which was originally made of mineral chalk, since it readily crumbles and leaves particles that stick loosely to rough surfaces, allowing it to make writing that can be readily erased. Blackboard chalk manufacture now may utilize mineral chalk, other mineral sources of calcium carbonate, or the mineral gypsum (calcium sulfate). While gypsum-based blackboard chalk is the lowest cost to
Beyond the Blackboard Beyond the Blackboard Beyond the Blackboard is a Hallmark Hall of Fame made-for-television drama film starring Emily VanCamp and Treat Williams. It is based on the memoir by Stacey Bess titled "Nobody Don't Love Nobody". The story takes place in 1987 and follows a young teacher and mother of two who, fresh from college, ends up teaching homeless children at a school without a name. With the support of her husband, she overcomes fears and prejudice to give these children the education they deserve. This film was filmed in and around Albuquerque, New Mexico. This was the first project together