For example, many schools became coeducational during the 1970s; many have changed their admissions approaches, over time, thereby attracting students from different cities and countries around the world so as to admit an increasingly diverse student culture; many have adjusted their curricula to reflect various educational trends; some, as we have seen, have changed their schedules to accommodate adolescent sleep needs, and many have changed their physical features by constructing state-of-the-art athletic facilities, integrated math-science buildings, modern theaters, and spacious libraries.
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Changes
