At Calhoun School, Longer Classes in 5 Short Terms - NYTimes.com - 0 views
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If the subject matter was a bit unusual for high school students, the amount of time they had to grapple with it was more so — 2 hours 10 minutes, in what is called a class block. Long blocks became standard this year at Calhoun, as part of a radical attempt to alter the structure of the school day and school year.