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  2. 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 Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.

  3. Whiteboard - Wikipedia

    en.wikipedia.org/wiki/Whiteboard

    Whiteboard with marker and eraser. 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.

  4. Clapperboard - Wikipedia

    en.wikipedia.org/wiki/Clapperboard

    Clapperboard. A clapperboard, also known as a dumb slate, clapboard, film clapper, film slate, movie slate, or production slate, is a device used in filmmaking, television production and video production to assist in synchronizing of picture and sound, and to designate and mark the various scenes and takes as they are filmed and audio-recorded.

  5. Ink poisoning symptoms. Ink from pens, markers, highlighters, etc., is considered minimally toxic and in such a small quantity that it’s commonly not a poisoning concern. Symptoms are typically ...

  6. Interactive whiteboard - Wikipedia

    en.wikipedia.org/wiki/Interactive_whiteboard

    A student uses the interactive whiteboard. An interactive whiteboard (IWB), also known as interactive board, interactive display, interactive digital board or smart board, is a large interactive display board in the form factor of a whiteboard. It can either be a standalone touchscreen computer used independently to perform tasks and operations ...

  7. How to Get Sharpie Off of Skin: Tips and Tricks - Healthline

    www.healthline.com/health/how-to-get-sharpie-off...

    Sea salt scrub. Sea salt has natural exfoliating properties. When mixed with warm water, you can make a gentle scrub to exfoliate the top layer of skin. Try mixing equal parts salt water and warm ...

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