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  2. Chalkboard eraser - Wikipedia

    en.wikipedia.org/wiki/Chalkboard_eraser

    A chalkboard eraser (sometimes known as a duster in India and elsewhere [1] [2]) 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 ...

  3. Blackboard - Wikipedia

    en.wikipedia.org/wiki/Blackboard

    A chalkboard with an eraser in the chalk tray. A blackboard can simply be a board painted with a dark matte paint (usually black, occasionally dark green). [1] Matte black plastic sign material (known as closed-cell PVC foamboard) is also used to create custom chalkboard art. [2]

  4. Talk:Blackboard - Wikipedia

    en.wikipedia.org/wiki/Talk:Blackboard

    Right you are; I've changed the image to show a more typical felt eraser as used in 20th century US classrooms. It was not uncommon for a wet sponge to be used at the end of the day, or as needed, to clear the chalk dust off the board. Just plain Bill 15:38, 25 November 2023 (UTC) @Just plain Bill Thanks very much!

  5. Do Not Erase: Mathematicians and Their Chalkboards

    en.wikipedia.org/wiki/Do_Not_Erase:...

    Do Not Erase is formatted as a sequence of 109 two-page spreads, [3] printed unusually in landscape mode: the pages are approximately letter size, but wider than they are tall. [2] Each spread features a full-color photograph of a mathematician's chalkboard, generally viewed straight on without visual embellishment, [ 1 ] although some include ...

  6. Whiteboard - Wikipedia

    en.wikipedia.org/wiki/Whiteboard

    A whiteboard (also known by marker board, dry-erase board, dry-wipe board, and pen-board) is a glossy, usually white surface for making non-permanent markings. Whiteboards are analogous to blackboards , but with a smoother surface allowing for rapid marking and erasing of markings on their surface.

  7. 55 Stocking Stuffers Under $5 (That Are Actually Useful) - AOL

    www.aol.com/finance/55-stocking-stuffers-under-5...

    Erasers: Walmart has fun Pen + Gear 3D erasers in the shapes of all kinds of treats such as cupcakes and popsicles for $4.97. Note pads: For all office supply goodies, Staples is a stop that makes ...

  8. Cells all over the body store 'memories': What does this mean ...

    www.aol.com/cells-over-body-store-memories...

    The “spacing effect” refers to a phenomenon whereby learning, or the creation of a memory, occurs more effectively when information, or exposure to a stimulus, is spaced out.

  9. Wet-wipe marker - Wikipedia

    en.wikipedia.org/wiki/Wet-wipe_marker

    Wet wipe markers were often used on overhead projector transparencies, as they could be stored and transported easily, unlike a traditional chalkboard. With the rise of computerized slide-shows (e.g. PowerPoint ) in the classroom and office, overhead usage has reduced substantially, and with it, the wet wipe marker.

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