A slate is used for comparing children to because it makes them seem blank.
slate
Slate was used for countertops, chalkboards, and is still used in roofing and pavers.
The answer is Slate. It is similar to Shale. It is still used but much less than 80 years ago. Slate is used in upscale roofing applications.
Victorian slate boards were mostly used by children in schools. Children used slate boards to learn how to write and spell.
it not a slate is a hand hold chalkboard
Writing on Slate Boards. If you don't know what a Slate Board is, then I suggest you Google it.
Slate can be used for blackboards, roofing and floors. When you crush it, you can use it flooring and paints.
Slate roofs were once very popular. Turkey calls are made from slate. Sinks have been made with slate. Patios, walkways, stones to sharpen knives, even tabletops have been made from slate. Slate is used in buildings, roofs for example, Slate tiles are often used for interior and exterior flooring, stairs etc, and because it is a good electrical insulator and fireproof, it was used to construct early 20th century electric switchboards and relay controls for large electric motors. Fine slate can also be used as a whetstone to hone knives.
Slate roofs were once very popular. Turkey calls are made from slate. Sinks have been made with slate. Patios, walkways, stones to sharpen knives, even tabletops have been made from slate. Slate is used in buildings, roofs for example, Slate tiles are often used for interior and exterior flooring, stairs etc, and because it is a good electrical insulator and fireproof, it was used to construct early 20th century electric switchboards and relay controls for large electric motors. Fine slate can also be used as a whetstone to hone knives.
building
Slate rock is normally used for roof tiles etc.
Slate can be used for flooring or for roofing material. It can also be framed and used for a writing board or in larger sections as a chalkboard in schools or for signs.