A simple tool used to display images onto a screen or wall.
By: Katarina Akopians
When, and by whom was the Overhead Projector invented?
what is an overhead projector used for?
How an overhead projector works
Advantages and Disadvantages the overhead has over other related technology
- Being able to use the chalkboard while teaching and having the overhead image
- Does not need a dark room to be darkened making it easy to read
- Requires no technology knowledge to operate
- Constant power supply
- Can only be projected onto flat white surface
- If the surface is not suitable inclined at the correct angle
- The image will suffer from a phenomenon called ‘key-stoning’
- More likely to crack or break, must handle with care
- Glare from projector hurts eyes
- If you write too small on the paper it will not be easily read on the screen
- They are overused in teaching because they are so convenient and easy to use
- New technology like smart boards are slowly replacing overheads
Akanegbu, A. with Anuli Akanegbu Anuli is a writer. (n.d.). Vision of Learning: A History of Classroom Projectors. Retrieved from http://www.edtechmagazine.com/k12/article/2013/02/vision-learning-history-classroom-projectors
Overhead Projectors K.V. (n.d.). Retrieved 9 March 2015, from https://grade10optics.wikispaces.com/Overhead%20Projectors%20K.V.?responseToken=0184a29171f4f00f5a044866793d9ba58
Using Overhead Projectors in The Classrooms. (2013). Retrieved from https://csinan.wordpress.com/2013/04/11/47/
What is an Overhead Projector? (with pictures). (n.d.). Retrieved from http://www.wisegeek.org/what-is-an-overhead-projector.htm