* Overhead projector (OHP): A device that projects transparent sheets onto a screen.
* Slide projector: A device that projects photographic slides onto a screen.
* Film projector: A device that projects motion picture film onto a screen.
* Video projector: A device that projects video images onto a screen.
* Interactive whiteboard: A large, touch-sensitive screen that allows users to interact with digital content.
Non-Projected Teaching Aids
* Blackboard: A large, erasable writing surface that is used to display text and diagrams.
* Whiteboard: A large, erasable writing surface that is made of a non-porous material.
* Flip chart: A large pad of paper that is used for displaying text and diagrams.
* Poster: A large, printed image that is used for display purposes.
* Model: A three-dimensional representation of an object that is used for teaching purposes.
* Realia: Objects that are used in the classroom to help students learn about a particular topic.