This 5th Grade Ratios & Proportions lesson supports key Common Core standards by strengthening the prerequisite skills needed for proportional reasoning, including 5.NF.A.1, 5.NF.B.3, 5.NF.B.4, 5.NF.B.6, and 5.NF.B.7 through fraction‑based ratio work, part–whole reasoning, and real‑world problem solving. It also aligns with 5.OA.A.1, 5.OA.A.2, and 5.OA.B.3 as students interpret numerical expressions, identify multiplicative patterns, and use structured ratio tables. Measurement reasoning conne