For mathematics instructors and students, the mathematics publishing company Worldwide Center for Math offers a number of instructional videos related to upper-level mathematics, including algebra, trigonometry, and precalculus. These videos are perhaps best browsed by playlist. One playlist, Think Thursday, features a series of short videos that present logic problems and brain teasers accompanied by a demonstration of how one might approach these problems. These short videos may especially appeal to mathematics instructors looking for warm-up activities. Other playlists include Musimathics: Music & Math; Basics: Proof; and the History of Greek Mathematics.
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