OHP USAGE IN MY SECONDARY SCHOOL

OHP or known as Overhead Projector is one of the famous tool used in government school 

widely before the existence of Computer Lab's in Malaysia. An overhead projector typically consists of a large box containing a very bright lamp and a fan to cool it. On top of the box is a large fresnel lens that collimates the light. Above the box, typically on a long arm, is a mirror and lens that focusses and redirects the light forward instead of up.Transparencies are placed on top of the lens for display. The light from the lamp travels through the transparency and into the mirror where it is shone forward onto a screen for display. The mirror allows both the presenter and the audience to see the image at the same time, the presenter looking down at the transparency as if writing, the audience looking forward at the screen. The height of the mirror can be adjusted, to both focus the image and to make the image larger or smaller depending on how close the projector is to the screen. ( http://en.wikipedia.org/wiki/Overhead_projector)

Usually in my secondary the OHP Slides are used mostly for Science subjects such as Chemistry, Biology and Physics. Normally the slides are been bought from some educational based companies and the teachers job would be put it on the slide and project it on the screen, so that the students can write their notes on the respective subjects. 

As for me lessons using OHP is quit boring as there are no animations or interesting objects are available there. Some students (including me) will always photostat the transparencies bacause it feels very irritating the jot down every single words from the transparencies that had been projected. 

As for the teachers (esp my physics teacher) her job has been very easy because everday during her period she just project the transparencies  and ask us the write notes. After each topic she will go through the notes as fast as she could. As for me and my friends we have to take tuition in order to understand the subject. So as for me the usage of OHP in my science subjects didnt improvise my education but is makes me to lose my interest on the subjects.

                                                 Sample of OHP