6th Grade Math Lesson
Sale or No Sale? Percentages, Discounts, and Battery Bars
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6th Grade3-Act MathCCSS.MATH.CONTENT.6.RP.A.3c45 min
Learning Objective
Students will understand that a percent represents a ratio of a quantity per 100, convert between fractions, decimals, and percents, and apply percent reasoning to real-world discount and battery-charge contexts.
Lesson Overview
Students use store discount signs and battery charge indicators to discover that a percentage is a ratio out of 100, then analyze competing retail promotions to find the best deal.
Materials
- Paper
- Pencils
- Whiteboard and markers
- Basic calculator or phone calculator
Scaffolded Task Progression
1Task 1
Look at the two sale signs (30% OFF and 1/4 OFF) and the battery showing 25%. Without calculating, rank these three values from least to greatest. Record your ranking and explain your reasoning in one sentence.
2Task 2
Warm-Up Grid Task: On your paper, draw a 10×10 grid (or use the one your teacher draws on the board). Shade the grid to show each value, then write the matching fraction and decimal.
a) Shade 50 squares.b) Shade 25 squares.c) Shade 7 squares. [ Interactive graph / diagram, available in the full lesson ]
a) Shade 50 squares.b) Shade 25 squares.c) Shade 7 squares. [ Interactive graph / diagram, available in the full lesson ]
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