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| Chapter 4. The Teaching Process
Reasons for Use of Instructional Aids In addition to helping students remember important information, instructional aids have other advantages. When properly used, they help gain and hold the attention of students. Audio or visual aids can be very useful in supporting a topic, and the combination of both audio and visual stimuli is particularly effective since the two most important senses are involved. Instructors should keep in mind that they are often salesmen of ideas, and many of the best sales techniques that attract the attention of potential clients are well worth considering. One caution—the instructional aid should keep student attention on the subject; it should not be a distracting gimmick. Clearly, a major goal of all instruction is for the student to be able to retain as much knowledge of the subject as possible, especially the key points. Numerous studies have attempted to determine how well instructional aids serve this purpose. Indications from the studies vary greatly—from modest results, which show a 10 to 15 percent increase in retention, to more optimistic results in which retention is increased by as much as 80 percent. [Figure 4-16]
Good instructional aids also can help solve certain language barrier problems. Consider the continued expansion of technical terminology in everyday usage. This, coupled with culturally diverse backgrounds of today’s students, makes it necessary for instructors to be precise in their choice of terminology. Words or terms used in an instructional aid should be carefully selected to convey the same meaning for the student as they do for the instructor. They should provide an accurate visual image and make learning easier for the student. Another use for instructional aids is to clarify the relationships between material objects and concepts. When relationships are presented visually, they often are much easier to understand. For example, the subsystems within a physical unit are relatively easy to relate to each other through the use of schematics or diagrams. Symbols, graphs, and diagrams can also show relationships of location, size, time, frequency, and value. By symbolizing the factors involved, it is even possible to visualize abstract relationships. Instructors are frequently asked to teach more and more in a smaller time frame. Instructional aids can help them do this. For example, instead of using many words to describe a sound, object, or function, the instructor plays a recording of the sound, shows a picture of the object, or presents a diagram of the function. Consequently, the student learns faster and more accurately, and the instructor saves time in the process. |
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