When the teacher makes up the story problems and want the students to make up more problems and exchange the math problems is an example of teaching principle of Generalization.
The teaching principle of Generalization is when the student are engaged in the skills taught for application to similar conditions.
The teaching principle of Generalization allows the students to acquire the knowledge in one circumstance and transfer same knowledge onto new situations.
So, when the teacher makes up the story problems and want the students to make up more problems and exchange the math problems is an example of teaching principle of Generalization.
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