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 Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.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

  4. Sidewalk chalk - Wikipedia

    en.wikipedia.org/wiki/Sidewalk_chalk

    A child drawing on concrete. Sidewalk chalk is typically large and thick sticks of chalk ( calcium sulfate, gypsum, rather than calcium carbonate, rock chalk) that come in multiple colors and are mostly used for drawing on pavement or concrete sidewalks, frequently four square courts or a hopscotch boards. Blackboard chalk, typically used in ...

  5. Chalkboard art - Wikipedia

    en.wikipedia.org/wiki/Chalkboard_art

    Chalkboard art. Children's drawing on a chalkboard. Chalkboard art or chalk art is the use of chalk on a blackboard as a visual art. [1] It is similar to art using pastels and related to sidewalk art that often uses chalk. Chalkboard art is often used in restaurants, shops or walls. [2]

  6. Silverpoint - Wikipedia

    en.wikipedia.org/wiki/Silverpoint

    Silverpoint, red chalk, and traces of black pencil on white-coated paper, Kunstmuseum Basel. Silverpoint (one of several types of metalpoint) is a traditional drawing technique and tool first used by medieval scribes on manuscripts.

  7. Learning in a pandemic, when 'online school' is the village ...

    www.aol.com/news/learning-pandemic-online-school...

    With her school shut because of the coronavirus, Tolu Alagba kneels as she copies down class notes from a communal village chalkboard, the closest thing to online lessons on an island with no ...

  8. Blackboard Learn - Wikipedia

    en.wikipedia.org/wiki/Blackboard_Learn

    Blackboard Learn (previously the Blackboard Learning Management System) is a web-based virtual learning environment and learning management system developed by Blackboard Inc. The software features course management, customizable open architecture, and scalable design that allows integration with student information systems and authentication ...

  9. Blackboard system - Wikipedia

    en.wikipedia.org/wiki/Blackboard_system

    A blackboard system is the central space in a multi-agent system. It's used for describing the world as a communication platform for agents. To realize a blackboard in a computer program, a machine readable notation is needed in which facts can be stored. One attempt in doing so is a SQL database, another option is the Learnable Task Modeling ...

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