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Turn fall leaves into real science! In this 3-day mini-unit, middle schoolers read about the pigments hiding in every leaf, run a leaf chromatography lab with simple supplies (leaves, rubbing alcohol, coffee filters), calculate Rf values, graph real-world style data, and write a CER explanation of why leaves change color. ★ Two engaging nonfiction passages with text-dependent questions ★ Full lab: pre-lab, illustrated procedure, data sheets, and safety notes ★ Rf value math with a worked example