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Standard 7.RP.3

7.RP.3 Solve real-world and mathematical problems involving ratios and percentages using proportional reasoning (e.g., multi-step dimensional analysis, percent increase/decrease, tax).

Grade(s): 6, 7, 8

Subject(s): Math

Year: 2015

Cotton Becomes King - Cotton Gin
Cotton Becomes King - Cotton Gin


Eli Whitney invented the Cotton Gin and in turn changed the path of America and its fortune. Read this excerpt from his obituary: Judge Johnson, of South Carolina, speaking of this invention, in 1807...