Can you simplify this square root?” Erica Fells asks her class, and hands wave in the air. All but one of the students believe that it’s impossible to do so. The dissenter, Leslie Alcantara, lays out her argument. “What do the rest of you think of Leslie’s reasoning?” Ms. Fells asks, and after some back-and-forth, they agree — she’s correct.
These students have been admitted to one of the City University of New York’s community colleges.
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