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  2. Writing lines - Wikipedia

    en.wikipedia.org/wiki/Writing_lines

    Writing lines involves copying a sentence on to a piece of standard paper or a chalkboard as many times as the punishment-giver deems necessary. The actual sentence to be copied varies but usually bears some relation to the reason the lines are being given in the first place, e.g., "I must not talk in class". [1]

  3. Chalkboard scraping - Wikipedia

    en.wikipedia.org/wiki/Chalkboard_scraping

    Chalkboard scraping. Scraping a chalkboard (also known as a blackboard) with one's fingernails produces a sound and feeling which most people find extremely irritating. The basis of the innate reaction to the sound has been studied in the field of psychoacoustics (the branch of psychology concerned with the perception of sound and its ...

  4. Blackboard - Wikipedia

    en.wikipedia.org/wiki/Blackboard

    Uses. Reusable writing surface on which text or drawings are made. A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.

  5. Blackboard bold - Wikipedia

    en.wikipedia.org/wiki/Blackboard_bold

    Blackboard bold is a style of writing bold symbols on a blackboard by doubling certain strokes, commonly used in mathematical lectures, and the derived style of typeface used in printed mathematical texts. The style is most commonly used to represent the number sets ( natural numbers ), ( integers ), ( rational numbers ), ( real numbers ), and ...

  6. Slate (writing) - Wikipedia

    en.wikipedia.org/wiki/Slate_(writing)

    The writing slate consisted of a piece of slate, typically either 4x6 inches or 7x10 inches, encased in a wooden frame. [1] A slate pencil was used to write on the slate board. It was made from a softer and lighter coloured stone such as shale or chalk. Usually, a piece of cloth or slate sponge was used to clean it and this was sometimes ...

  7. Eraser - Wikipedia

    en.wikipedia.org/wiki/Eraser

    Chalk writing leaves light-colored particles weakly adhering to a dark surface (e.g., white on black, or yellow on green); it can be rubbed off with a soft material, such as a rag. Erasers for chalkboards are made, with a block of plastic or wood, much larger than an eraser for pen or pencil, with a layer of felt on one side.

  8. Chalkboard eraser - Wikipedia

    en.wikipedia.org/wiki/Chalkboard_eraser

    A chalkboard eraser is a special type of eraser specifically used to erase chalk markings on slating paint (used on chalkboards and slates ). It is most commonly made of felt strips attached to a handle. Chalkboard erasers are typically broad and rectangular, intended to clear large areas for new content as part of a lecture or presentation.

  9. Chalking the door - Wikipedia

    en.wikipedia.org/wiki/Chalking_the_door

    Chalking the door. Epiphany season door chalking on an apartment door in Germany. A Christmas wreath adorning a home, with the top left-hand corner of the front door chalked for Epiphany-tide and the wreath hanger bearing a placard of the archangel Gabriel. Chalking the door is a Christian Epiphanytide tradition used to bless one's home, [1 ...

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