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Comparing or contrasting:
Even though high school and college are both places of learning, they differ in at least three ways. The first difference between high school and college is their social atmospheres. In high school the building is usually smaller, so most students know each other. In addition, students in high school have the same six-hour 7:40 to 2:30 day, which helps them to know one another better. At college people are constantly coming and going, rarely seeing the same person twice in one day.