Whiteboard
Whiteboards became commercially available in the early 1960s, but did not become widely used until 30 years later. Early whiteboards needed to be wiped with a damp cloth and markers had a tendency to leave marks behind, even after erasing the board. Dry-erase markers for whiteboards were invented in 1975.
Interactive whiteboard
Dixons City Academy in the North of England was the first non college or university learning environment to make use of interactive whiteboards after the school's then principal Sir John Lewis showed a keen interest in the developing technology. An interactive whiteboard can now be found in every classroom of the school.