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<p>While the number of AP tests has increased, much of the increase has been “AP lite” courses that are either not commonly accepted or accepted for only a semester (human geography, statistics, environmental science, psychology, computer science A, etc.).</p>
<p>Also, many biology and chemistry majors are pre-med, and many of them repeat their biology and chemistry AP credit because they would rather try for what they think will be an “easy A” instead of taking more advanced biology, chemistry, and biochemistry courses to fulfill pre-med requirements, so they do not actually skip those time consuming lab science courses. Physics (and engineering) majors often do not skip introductory physics either, because physics C is not commonly offered in high school, and not all colleges accept even physics C.</p>