Small classes are very popular with parents. Fewer kids in a room can mean more personal attention for their little ones. Teachers like them too. Fewer kids mean fewer tests to mark and fewer disruptions. Communities across the United States have invested enormously in smaller classes over the past 50 years. Pupil-teacher ratios declined from 22.3 in 1970 to 17.9 in 1985 and dropped to a low of 15.3 in 2008.

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Source: The Hechninger Report, Nov. 5, 2018.