Bistro Math Lesson Plan Bistro Math Lesson Plan
Topic: Fraction Operations & Recipe Scaling
Teacher Resource
Grade Level
6th Grade
Duration
60-90 Minutes
Subject
Mathematics
Learning Objectives
Students will multiply fractions by whole numbers and other fractions to scale recipes up or down.
Students will divide fractions to determine serving sizes and portions.
Students will add and subtract fractions with unlike denominators to combine or adjust ingredients.
Students will collaborate in teams to solve multi-step word problems in a simulated culinary environment.
CCSS Standards Alignment:
6.NS.A.1 (Interpret and compute quotients of fractions), 5.NF.B.4 (Apply and extend previous understandings of multiplication to multiply a fraction or whole number by a fraction), 5.NF.A.1 (Add and subtract fractions with unlike denominators).
Pantry Essentials
The Cooking Process
1
The Appetizer: Hook & Activate (10 min)
Present a scenario: You're hosting a dinner party for 12, but your Grandma's famous "Secret Sauce" recipe only serves 4. Ask: "How do we make sure everyone gets enough sauce without ruining the flavor?" Facilitate a brief discussion on multiplying quantities.
2
The Main Course: Instruction (20 min)
Use the Chef Training Slides to model scaling. Demonstrate doubling (multiplying by 2) and halving (multiplying by 1/2 or dividing by 2). Walk through a sample recipe calculation on the board, emphasizing simplifying fractions and converting improper fractions to mixed numbers.
3
The Culinary Challenge: Group Activity (35 min)
Divide students into "Kitchen Crews." Hand out the Recipe Scaling Challenge cards. Each crew receives a different dish (e.g., "Mega Meatballs" or "Gigantic Guacamole") and a "Guest Order" (e.g., Serve 30 people, but recipe serves 8). Crews must calculate new measurements.
4
The Dessert: Assessment & Debrief (15 min)
Individual work on the Kitchen Math Worksheet. End with a "Flavor Check" discussion: Which fraction operation was the trickiest? How do units (cups, teaspoons) make a difference?
Chef's Tips for Success
Support: Provide visual aids (measuring cups) or multiplication charts. Allow students to use models or drawings to represent fractional amounts.
Extension: Have advanced students calculate the unit cost of ingredients for their scaled recipes based on a provided price list.
Chef Training Slides Presentation Chef Training
Fraction Feast: Level 1 Certification
The Kitchen Dilemma
You have a recipe for Secret Sauce that serves 4 people.
But wait...
You need to serve 12 people!
What is your scaling factor?
?
Think: How many times does 4 go into 12?
Scaling Up
Multiplication
The Rule
To increase a recipe, multiply every ingredient by the scaling factor.
Pro Tip:
Turn whole numbers into fractions! \(3 = \frac{3}{1}\)
Example: Tripling \( \frac{3}{4} \) cup
\[ \frac{3}{4} \times \frac{3}{1} = \frac{9}{4} \]
Simplify for the Chef:
\( \frac{9}{4} = 2\frac{1}{4} \) cups
Scaling Down
Division
Halving
Divide by 2
The Math:
Need half of \( \frac{2}{3} \) tsp salt?
\[ \frac{2}{3} \times \frac{1}{2} = \frac{2}{6} = \frac{1}{3} \text{ tsp} \]
Remember: Multiplying by a unit fraction is the same as dividing by its denominator!
The Mixed Number Trap
Master Chef Level Only
1
Step One
Convert mixed numbers to improper fractions .
\( 1\frac{1}{2} \rightarrow \frac{3}{2} \)
2
Step Two
Perform the operation (multiply or divide).
\( \frac{3}{2} \times 2 = \frac{6}{2} \)
3
Step Three
Convert back to mixed numbers for the kitchen.
\( \frac{6}{2} = 3 \text{ cups} \)
Your Mission
You are now official Kitchen Math Crews. Your job is to scale your assigned recipe to meet your guests' needs.
1
Identify your Scaling Factor.
2
Apply fraction operations to every ingredient.
3
Verify your results on the Final Order sheet.
Operation: Fraction Feast
Recipe Scaling Challenge Cards Kitchen Crew Challenge
Operation: Recipe Scaling
Group Activity
Ticket #01: Mega Meatballs
ORDER: SCALE x3
Original Recipe (Serves 6)
• \( 1\frac{1}{2} \) lbs Ground Beef
• \( \frac{3}{4} \) cup Breadcrumbs
• \( \frac{2}{3} \) cup Parmesan
• \( 1 \) tsp Dried Oregano
Kitchen Mission
The Mayor is coming! Scale this recipe to serve 18 guests. Show your math on the log.
Bistro Math Academy
Ticket #02: Fiesta Salsa
ORDER: SCALE x4
Original Recipe (Serves 4)
• \( 2\frac{1}{4} \) cups Diced Tomatoes
• \( \frac{1}{3} \) cup Red Onion
• \( 1\frac{1}{2} \) tbsp Lime Juice
• \( \frac{1}{8} \) tsp Cayenne Pepper
Kitchen Mission
The soccer team is here! Scale this recipe to serve 16 people. Be careful with those mixed numbers!
Bistro Math Academy
Ticket #03: Petite Pasta
ORDER: SCALE x1/2
Original Recipe (Serves 8)
• \( 1 \) lb Penne Pasta
• \( 2\frac{2}{3} \) cups Marinara
• \( \frac{1}{2} \) tsp Red Pepper Flakes
• \( 3\frac{1}{4} \) tbsp Olive Oil
Kitchen Mission
A small table of 4 just sat down. Halve (1/2) this recipe so we don't waste ingredients.
Bistro Math Academy
Ticket #04: Sample Soup
ORDER: SCALE x1/3
Original Recipe (Serves 12)
• \( 6 \) cups Chicken Broth
• \( 2\frac{1}{2} \) cups Sliced Carrots
• \( \frac{3}{4} \) tsp Thyme
• \( 1\frac{1}{3} \) cups Diced Celery
Kitchen Mission
We need appetizers for 4 people. Divide the original recipe by 3 to make the samples.
Bistro Math Academy
Kitchen Crew Order Log
Crew Name: _________________________________________________
Date: _________________
1
Ticket #01: Mega Meatballs (Scaling Factor: _____)
Calculations
Final Scaled Ingredients
2
Ticket #02: Fiesta Salsa (Scaling Factor: _____)
Calculations
Final Scaled Ingredients
3
Ticket #03: Petite Pasta (Scaling Factor: _____)
Calculations
Final Scaled Ingredients
Kitchen Math Worksheet Assessment Kitchen Math Worksheet
Certified Chef
CHEF NAME:
SHIFT DATE:
Station 1: Quick Prep Scaling
Show your work! Scale the following single ingredients by the factor provided.
1. \( \frac{3}{4} \) cup of milk \(\times\) 3
Scaled Amount: _________________
2. \( 2\frac{1}{2} \) tsp of vanilla \(\times\) 2
Scaled Amount: _________________
3. \( \frac{2}{3} \) lb of butter \(\div\) 2
Scaled Amount: _________________
4. \( 1\frac{1}{3} \) cups of flour \(\times \frac{1}{2} \)
Scaled Amount: _________________
Station 2: The Mixing Bowl
The Secret Spices
A chef combines \( \frac{3}{8} \) tsp of garlic powder and \( \frac{1}{4} \) tsp of onion powder. How many total teaspoons of spice are in the bowl?
Total:
The Leftover Broth
The pantry has \( 5\frac{3}{4} \) cups of broth. A recipe for soup requires \( 2\frac{1}{3} \) cups. How much broth will be left over after making the soup?
Remaining:
Station 3: Head Chef's Challenge
You are making Chocolate Lava Cakes for a party. The recipe for 6 cakes requires \( \frac{2}{3} \) cup of cocoa powder. You need to make 24 cakes.
A. What is the scaling factor?
B. Total cocoa needed?
C. Explain your process below:
Bistro Math Academy • Student Assessment
Chef Quality Rubric Assessment Chef Quality Rubric
Culinary Math Challenge
Total Score
/ 20
5
Executive Chef
4
Sous Chef
3
Line Cook
2-1
Kitchen Trainee
Criterion Exceeds (5) Meets (4-3) Developing (2-1) Scaling Accuracy All recipe ingredients are scaled perfectly. Calculations are 100% correct. Most ingredients are scaled correctly. Only 1-2 minor calculation errors. Multiple errors in scaling or scaling factor was applied incorrectly. Mathematical Process Clearly shows all steps, including improper fraction conversions and simplification. Shows most work. Most fractions are simplified correctly. Work is missing or hard to follow. Fractions left in improper form. Kitchen Collaboration Crew worked seamlessly. Every member contributed to the math log. Crew worked well together. Tasks were shared among most members. Limited cooperation. One person did most of the work or crew was off-task. Organization & Units Log is neat and professional. All final answers include correct units (cups, tsp, lbs). Log is readable. Most answers include correct measurement units. Log is messy or disorganized. Measurement units are missing or incorrect.
Chef's Tasting Notes (Teacher Feedback)
Validated by Bistro Math Academy
FORM: RUBRIC-6-NF-SCALING
