Once upon a time the school day, like a sentence, was punctuated by class periods. Children's thinking was confined to one area at a time. Learning was compartmentalized. One class period ended, and they put their math books away and opened their readers, and so the day went, with science textbooks following, readers, math workbooks, and perhaps a trip to the gym, And so it went until the dismissal bell put an end to their day of disjointed learning.
