The still image: from the overhead projector to the power-point…
The still image: from the overhead projector to the power-point
The fixed image and use of teaching
The importance of images in the teaching / learning processes is notable in many
The images are motivating, sensitizing and stimulating students' interest in a particular subject.
They allow you to know the past better (engravings, monuments ...) or to see realities that are rarely accessible.
They can simplify or synthesize complex realities
Advantages and disadvantages of using the overhead projector in the classroom
The devices with which the sound media are handled are inexpensive, manageable and easy to use.
The recordings can also be used for an evaluative purpose of the students.
They provide diverse sound documentation: musical, about folklore, sounds of nature, conversations of people who are not present.
When used to provide ambient music can generate a pleasant and relaxing environment.
The overhead projector: technical performance
It is a relatively cheap and very easy to use device that appears in the 40's and is the only audiovisual device designed specifically for education.
Advantages of using
They are an ideal medium for teaching to large groups.
They can be used with any subject and educational level.
The projector is easy to use.
They help the teacher or the speaker, acting as a reminder of the main issues to be addressed.
Guidance and suggestions for its didactic use
The active participation of the debates in the audience should be encouraged.
Students should be placed so that everyone can clearly see the projected message.
It is convenient to select the most significant transparencies to avoid the fatigue of the audience.
Techniques for the elaboration of transparencies by manual and mechanical procedures.
Transparencies are graphics, photographs and diagrams printed or photocopied on transparent sheets of acetate, usually DINA4 size but also in continuous roll format, which can be projected onto a screen using the overhead projector or overhead projector.
Principios del diseño de transparencias. ¿Cómo se hace y cómo se usa una transparencia?
Like the overhead projector, it is advisable to place it permanently in the large room as it is a heavy-duty apparatus that is difficult to transport.
Advantages and disadvantages of using
It shares the advantages of the projector of transparencies, although due to its low luminous power it demands the darkening of the room where it uses