Smoothie Bar Designer — Unit 3 Culminating Project

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🗺️ Your Mission

The school store has approved your smoothie bar idea! To launch it, you need to write a ratio recipe, scale it for bigger batches with an equivalent ratio table, calculate a unit rate so you can price your smoothies fairly, and find the better buy on ingredients. Fill in every calculator, hit the buttons, check off your list, and write your menu board reflection. Then print it for the store manager.

Writing & Simplifying Ratios · 6.RP.1

Write Your Smoothie Recipe Ratio

Every smoothie starts as a ratio. Choose how many cups of fruit and cups of yogurt go into one batch. The calculator will show your ratio in all three forms and simplify it.

Your recipe: Choose the number of cups of fruit and cups of yogurt for one batch. Pick values that share a common factor so you can see simplification work (e.g., 4 and 6, or 6 and 9).

Cups of fruit

Cups of yogurt

Need a hint?

A ratio compares two quantities. If you have 6 cups of fruit and 4 cups of yogurt, you can write it as 6:4, 6 to 4, or 6/4. To simplify, divide both numbers by their GCF. GCF(6, 4) = 2, so the simplified ratio is 3:2.

Equivalent Ratios & Ratio Tables · 6.RP.3

Scale Up Your Recipe

Your recipe ratio is just one batch. Build an equivalent ratio table showing 1×, 2×, and 3× the recipe so you can serve more smoothies without changing the taste.

Enter your base recipe amounts (you can use the same values from Phase 1, or try new ones). Then generate the table.

Base cups of fruit (1×)

Base cups of yogurt (1×)

Need a hint?

To build equivalent ratios, multiply both parts of the ratio by the same number. If your base is 6:4, then 2× = 12:8 and 3× = 18:12. All three ratios are equivalent because they all simplify to 3:2. The taste stays the same!

Unit Rate & Better Buy · 6.RP.2 · 6.RP.3

Price Your Smoothies Fairly

Find the unit rate (cost per smoothie) so you can set a fair price. Then use unit rates to compare two ingredient packs and decide which is the better buy.

Part A — Unit Rate: How much does it cost to make a batch, and how many smoothies does one batch make?

Total cost for the batch ($)

Smoothies per batch

Part B — Better Buy: Compare two yogurt packs. Which one costs less per cup?

Pack A: total price ($)

Pack A: number of cups

Pack B: total price ($)

Pack B: number of cups

Need a hint?

A unit rate has a denominator of 1. To find cost per smoothie, divide total cost ÷ number of smoothies: $9.00 ÷ 3 = $3.00 per smoothie. For the better buy, find cost per cup for each pack: $4.50 ÷ 3 = $1.50/cup vs. $7.20 ÷ 6 = $1.20/cup. The lower unit price is the better buy.

Ratio Reasoning & Quick Check · 6.RP.1 · 6.RP.3

Menu Board Decision & Quick Check

Choose which smoothie flavor ratio to feature on your menu board. Then check your ratio skills with a known-answer problem.

Menu Board Decision: Pick the flavor mix that you would feature. Which ratio of fruit to yogurt looks best for your menu?

My featured smoothie ratio is (e.g., 3:2 fruit to yogurt) Why did you choose this ratio? (What does it say about the flavor?)

Quick check: Simplify the ratio 12:18. What is the simplified form?
(Hint: divide both numbers by their GCF.)

Your simplified ratio (write as A:B)

★

Final Deliverable

Write Your Menu Board Reflection

Write a 3–5 sentence reflection explaining your smoothie bar decisions. Use your real ratio, table, and unit rate numbers from above.

Smoothie Bar Checklist

I wrote my ratio in all 3 forms (a:b, a to b, a/b) and simplified it.
I built an equivalent ratio table for 1×, 2×, and 3× batches.
I found the unit rate (cost per smoothie) for my recipe.
I compared two packs using unit prices to find the better buy.
I wrote a reflection that uses my real ratio and rate numbers.

✓

How You Are Scored

Project Rubric

Category	4 — Expert	3 — Proficient	2 — Developing
Writing & Simplifying Ratios	All 3 forms correct; simplified using GCF with reasoning shown	All 3 forms correct; simplified correctly	Ratio written but simplification incomplete or one form missing
Equivalent Ratios / Table	All table rows correct; explains how ratios stay equivalent	All table rows correct	One or two rows correct; pattern partially shown
Unit Rate & Better Buy	Unit rate correct; better buy identified with both unit prices compared	Unit rate correct; better buy correct	Unit rate attempted; better buy missing or incorrect
Communication	Reflection clearly justifies every number and decision	Reflection uses most numbers and gives a clear decision	Reflection is unclear or missing key numbers