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An important question about education is, then, why do some types of students achieve success easily and others struggle to do well? Well, one theory is that there is a genetic reason for academic achievement. What I mean by that is, a certain innate, measurable level of intelligence . Another frequently discussed theory is environmental factors, such as the effect of home and family upbringing. A final reason is related to the teaching and learning process within educational institutions, and the way it is organized, administered and assessed .