Slate boards are flat, rectangular pieces of slate, a natural stone, often used for writing or drawing. They have a smooth surface that can be easily written on with chalk. Historically, slate boards were common in classrooms before the widespread use of paper and whiteboards, allowing students to practice writing and arithmetic. Today, slate boards are still used in some educational settings and are popular for artistic purposes. They can be found in various sizes and are often used for decorative signs or menus in restaurants. The durability of slate makes it a long-lasting option for both learning and creative expression.