Students learn that a ratio compares two amounts — like 2 cups of blue paint to 3 of yellow — and that scaling both amounts up keeps the ratio the same, the foundation of proportional thinking.
Students will be able to…
A recipe uses 2 scoops of blue for every 3 of orange. If you double it, is it still the same color? What stays the same in a ratio?
Project this and set a ratio of blue to orange. Change the number of batches and watch the ratio table — the ratio stays the same!
Tap any phase to open the teacher moves and student actions.
2 blue to 3 orange — double it. Same color mix?
Teacher models.
Class drives the Ratio Builder.
Students use ratios.
One ratio.
Aligned to the Common Core State Standards for Mathematics, including the Standards for Mathematical Practice.
Understand the concept of a ratio and use ratio language to describe a relationship.
Make tables of equivalent ratios and find missing values.
Use ratio and rate reasoning to solve real-world problems.
Reason quantitatively about ratios.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students use a ratio to mix a “paint recipe” and scale it up to make a bigger batch. A printable ratio-recipe sheet is in the Math library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.