Blackboard

Blackboard

A blackboard, also called a chalkboard, is a surface on which chalk is visible. It is used as a surface to write on. It is usually made up of wood or fiber. It is painted black to reflect the white chalks.

Blackboards are often used to help in teaching in school. Blackboards are not used as much now but can be seen in some schools still. The chalk dust got everywhere, and some people are allergic to chalk dust. Now people use whiteboards: they can take modern felt-tip colour markers, and clean easily.

Schoolteachers often use the chalkboard to display things at large. It also makes the learning cooperative between teachers and student. Chalkboards can be black or dark green, in which case they may be called blackboards and greenboards.

Blackboard Media

• A chalkboard with an eraser in the chalk tray

• Craie2.jpg

  Stick-slip effect with a chalk on a blackboard

• Chalkboard-writing.ogg

  Sound of mathematical formulas written with a chalk stick on a blackboard

• Retouched drawing of a teacher at blackboard for an advertisement, 1924

• Kyomachi No.8 Café welcome blackboard 20190406.jpg

  An advertising blackboard in Taipei, Taiwan, 2019

• The board.jpg

  Mathematics on a board, 2017

• ASC Leiden - Coutinho Collection - 12 18 - Campada college on the northern frontline, Guinea-Bissau - 1973.tif

  Teacher explaining the decimal system of weights using a blackboard, Guinea-Bissau, 1974

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  An Austrian chemist with colored chalk, 1970

• Boy in school, 1961 (52338002867).jpg

  A schoolboy in Seattle, WA, USA, 1961