KARAK — Long before whiteboards, beamers and laptops entered modern school classrooms, teachers relied on the humble, dusty, sometimes screechy blackboard chalk — a material that has created a ...
Jordanian workers put coloured chalk through a machine in the factory in Karak, south of the capital Amman — Khalil MAZRAAWI Long before whiteboards, beamers and laptops entered modern school ...
Chalk, a white, soft limestone, was formed aeons ago when the shells of tiny marine creatures were compressed on the sea floor. Jordanian workers put coloured chalk ...
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