Who Invented the Blackboard

A blackboard also referred to as a chalkboard is a reusable writing surface upon which text or drawings are made with chalk. The boards are generally made of thin and soft sheet of slate stone in black or dark grey. Modern versions of these blackboards are available in green and brown and are referred as green board or brown board. History of the blackboard can be traced from 18th century. Blackboard was invented by James […]