The Three Rs are a humorous acronym, somewhat archaic, for a traditional primary school curriculum. They are used by schoolchildren, and stand for "readin', 'ritin', and 'rithmetic".

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In environmentalism, the Three Rs stand for recycle, reuse, and reduce.

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The Three Rs also refers to Franklin Delano Roosevelt's plan to better the United States' situation in the Great Depression. They stood for Relief, Recovery, and Reform.