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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 Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.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. 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. Dysgraphia: Signs, Diagnosis, Treatment - WebMD

   www.webmd.com/add-adhd/childhood-adhd/dysgraphia...

   Other signs of dysgraphia to watch for include: Cramped grip, which may lead to a sore hand. Difficulty spacing things out on paper or within margins (poor spatial planning) Frequent erasing ...

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. Dysgraphia: Symptoms, Causes, Treatment, Management - Healthline

   www.healthline.com/health/what-is-dysgraphia

   inappropriate sizing and spacing of letters. difficulty copying words. slow or labored writing. difficulty visualizing words before writing them. unusual body or hand position when writing. tight ...

7. 9 Depression Symptoms to Look Out For - Healthline

   www.healthline.com/health/depression/recognizing...

   Depression is also linked to insomnia, and they can feed off each other. A lack of restful sleep may lead to anxiety. 4. Anxiety. Depression and anxiety often occur together. Symptoms of anxiety ...