Slate blackboards are made from natural slate, a type of fine-grained metamorphic rock primarily composed of clay minerals. The slate is quarried into thin sheets, which are then cut and shaped into the desired size and shape for the blackboard. Slate blackboards are known for their durability and provide a smooth writing surface.
Composition blackboards, also known as composite blackboards, are made of a mixture of materials. They typically consist of a core made of a composite of wood, fiber, or other materials. This core is then coated with a layer of a dark, non-reflective material that provides the writing surface. Composition blackboards are lightweight, portable, and cost-effective compared to slate blackboards.
In recent years, digital whiteboards, also known as interactive whiteboards, have gained popularity. These whiteboards use electronic display technology and allow users to interact with digital content and make annotations. They can be used in place of traditional blackboards in classrooms and other settings.