"The most important single factor influencing learning is what the learner already knows. Ascertain this and teach him accordingly."

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...a student attains 'higher order thinking' when he no longer believes in right or wrong". "A large part of what we call good teaching is a teacher´s ability to obtain affective objectives by challenging the student's fixed beliefs. ...a large part of what we call teaching is that the teacher should be able to use education to reorganize a child's thoughts, attitudes, and feelings.

— Benjamin Bloom