Educational devices

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, better known as chalk.

diagram to visually organize information

thumb|Researcher writing on a whiteboard thumb|Whiteboard with marker and eraser A whiteboard (also known as marker board, dry-erase board, dry-wipe board, and pen-board) is a glossy, usually white surface for making non-permanent markings. Whiteboards are analogous to blackboards, but with a smoother surface allowing for rapid marking and erasing of markings on their surface. The popularity of whiteboards increased rapidly in the mid-1990s and they have become a fixture in many offices, meeting rooms, school classrooms, public events and other work environments.

stationery item consisting of a pad of large paper sheets, often used in presentations

thin piece of flat material used as a medium for writing

thumb|Birching of a prison inmate during interrogation; The Netherlands, 17th century

Type of eraser designed to erase chalk