Please enable JavaScript.
Coggle requires JavaScript to display documents.
The still image: from the overhead projector to the powerpoint - Coggle…
The still image: from the overhead projector to the powerpoint
Advantages and disadvantages of using the
overhead projector in the classroom.
ADVANTAGES THAT THE MEDIA CAN PROVIDE
SOUND.
They contribute to improve diction, since they allow listening
voices with good vocalization and timbre.
They provide diverse sound documentation: musical, on the
folklore, sounds of nature, conversations of people who are not present.
Recordings can also be used for a purpose
evaluative of the students.
Allow activities to improve the ability of
listen: hold attention, follow instructions, listen critically, appreciate good diction.
The devices with which the sound media are handled are
cheap, handy and easy to use
The overhead projector: technical operation
The overhead projector or overhead projector is a relatively inexpensive and easy-to-use device that appeared in the 1940s and is the only audiovisual device designed specifically for education.
Advantages of using it
They are an ideal medium for teaching large groups.
The projection room can be illuminated, so that facilitates the taking of notes and the participation of the audience.
Images and diagrams attract the attention of
students and increase their motivation.
Guidelines for the preparation of transparencies.
Each transparency must present a single idea, in about 6 lines of about 6 words each. The sentences must be simple, concise and expresive.
The message must have a clear intention and be correct
structured.
The letters must be clear, large and well legible. Must
make sure that the students in the last row of the room can also read the texts.
To manage its operation the teacher has
generally from the following controls:
Adjusting the mirror tilt to adjust the image on the
screen or wall.
The approach, which is usually done by a wheel that brings
or move the projection optical system away from transparency.
The appliance's power switch, which activates the fan
Guidelines and suggestions for its educational use.
Active participation in discussions in the
audience
They can be used as a means of evaluation by asking the
students their interpretation or using them to start a debate
As the screen attracts a lot of attention, it is advisable to turn off the projector when giving additional explanations.
Principles of transparency design. How I know
does and how do you use a transparency
The opaque body projector or opascope is a fairly expensive, heavy and voluminous device, which due to its low luminosity (since it projects a previously reflected image) requires a significant darkening of the room, and that for this reason it is rarely used.
Advantages and disadvantages of its use
However, it provides some additional advantage: it allows to project, without any previous preparation, original documents, graphics or selected schemes from books, magazines, newspapers ...
As it dissipates a lot of heat, it is necessary to avoid excessively lengthening the projection of the original documents, since they can deteriorate.
Guidelines for preparing documents for the
opascope.
The scope is basically used to project, either directly or through photocopies, documents or images and texts from books, newspapers and magazines.
To manage its operation the teacher has
generally from the following controls:
The halogen bulb switch, which provides the source
of light
El ajuste de la inclinación de los pies del aparato para ajustar la
imagen en la pantalla o pared.
The appliance's power switch, which activates the fan
Guidelines and suggestions for its educational use.
The suggested guidelines for the projection of transparencies can also be used for the projection of images printed on paper.
Still Image and Teaching Use
The importance of images in teaching / learning processes is remarkable in many ways,They allow to know better the past (engravings, monuments ...) or among them:
They allow to know better the past (engravings, monuments ...)
see realities that are not usually accessible (images from microscopes, telescopes ...)
They can simplify or synthesize complex realities (diagrams,
schemes ...)
The images are motivating, sensitize and stimulate the
students' interest in a specific subject.
Techniques for preparing transparencies by
manual and mechanical procedures
Transparencies are graphics, photographs and diagrams printed or photocopied on transparent acetate sheets, usually DINA4 in size but also in continuous roll format, which can be projected onto a screen using the overhead projector or overhead projector.