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“CONTRIVED EXPERIENCES”(Models)
BSEd II-AJaysa V. Aragon
What are contrived experiences?
These are the second band of experiences in Dale’s Cone of Experience.
These are “edited” copies of reality and are used as substitutes for real things when it is not practical or not possible to bring or do the real thing in the classroom.
What is a model? It is a reproduction of a real thing
in a small, or a large scale, or exact size.
It is a substitute for a real thing which may or may not be operational.
Examples: An atom, the solar system, the
pyramid in Egypt. . .
Why do we make use of model?
Overcome limitations of space and time To “edit” reality for us to be able to focus
on parts or a process of a system that we intend to study
To overcome difficulties of size To understand the inaccessible Help the learners understand
abstractions
Advantages:Models provide motivation and
enhance learning.Oversized objects can be reduced in
size and can be studied in the classroom.
Some models can be purchased from commercial firms.
The parts can be built as to scale and can appear exactly like the real object.
Disadvantages:Purchase of models can be costly.If models are built as to scale, it
could be time consuming.
Guidelines: Emphasize the size of the real object
while being used.Use of moving models can catch
attention and interest easily.Encourage students to construct
simple models with parts in correct proportion.
Some models can be kept for display for a long time depending on the materials used.
The most important thing to remember when we make use of models are: to make them as we could to the
real things that represent.If for one reason or another they
could not replicate the real things in size and color, and
we should at least cautions the user or the reader by giving the scale.
Criteria For Evaluation:Is the model necessary on case you
make use of the original? Could some other device portray the
idea more effectively? Is the idea appropriate for
representation in a model? Is each part of the model made to
the same scale proportionate in size?
Are the important details of construction correct?
Could wrong impressions of size, color and shape result from using this model?
Does the model oversimplify the idea?
If it is workable, will at standup under frequent use?
If it is made locally, is the model likely to be
worth the time, effort and money involved?
If it is purchased, will the model be used often enough to justify the cost?
Aims:To give the students an exact picture
of the thing that being discussed.To aid the questions of the students
about the lesson being presented.
Demonstration:
“Surface Areas of Geometric Solids”
What is the total surface area of a geometric solid? it is the sum of the areas of all its
polygonal faces or sides.
Surface Area of a Pyramid its total surface is equal to the area
of the square base, plus the area of the four triangles
Let us say each triangle has an
altitude a and a base b. Then the total surface area is
T.S.= 1/2ab(4)+b^2 = 1/2a+b^2
Semi-detailed Lesson Plan in Mathematics(Concepts and Operations)
Level: First Year High SchoolSubject: Mathematics, Concepts and Operations, Surface Areas of Geometric Solids
I. Objectives: A. To know the formula in getting the surface
area of a pyramid. B. To recognize pyramid through the model. C. To solve the surface area of a pyramid
through the formula given. II. Subject Matter: Concept: Surface Area of a Pyramid Book: Math I (page 228)
III. Materials: model of a pyramid chalkboard rulerIV. Teaching Strategies: A. Review B. Motivation I have some problems written on the
board then they will answer it by using the formula on
how to get the surface area of a pyramid. C. Lesson Proper a.) Presentation
-Showing on how to make a model of a pyramid.
-Getting the surface area of a pyramid by using the
formula given. b.) Development Discussion of the lesson is given by
the teacher. c.) Classroom Interaction -Oral Participation -Board work V. Evaluation: QuizVI. Assignment: Concept: Area of the Surface of a
Cylinder(page 228)