Baking For How Many?!

When inviting ten could mean fifteen!
Integration: Math and Culinary Arts
Grade Level: 4-6
Lesson Time: ~50 Minutes
Math Concepts: Multiplying Integers, Fractions and Mixed Fractions
Culinary Arts Concepts: Recipe Adjustment
Character Building: It is impolite to "uninvite" guests.

Baking and cooking recipes are filled with fractions. What happens when the number of people we invite is greater than the suggested serving for the recipe? Students will learn how to adjust a cake recipe of their choice because some of the people they invited turned out to invite a "plus 1"!

Math Concepts: Scalars, Multiplying Integers, Fractions and Mixed Fractions

Culinary Arts Concepts: Recipe Adjustment

Some students may decide to go back and adjust the number of friends they initially invited in order to lower the total guest count. It is impolite to do so as this will lead to hurt feelings. Be careful not to give extra credit to those who bring a cake to class as this will be unfair to families with less resources.

PART I - The Recipe

Have students find a recipe from home or from the internet of their favorite cake. Have them fill in the recipe table with the ingredients, amount, and units of measure. If they need more lines, use the + and - buttons at the bottom of the table. Have them also fill in the recipe's suggested serving and total time to cook. There is also an option to copy the link of the site where they found their cake and to copy and past the directions.

PART II - The Invites

Students can invite as many people as they want here. If you have a community culture within your class, the number of invites should be the total number of students (plus the teacher) and anyone else outside the class.

PART III - The Problem (and the Solution)

Students will learn that half of the people they invited, invited an additional person to the party. They will have to adjust the total guest count. This will also affect the recipe they chose. They will have to determine the scalar to multiply every amount by in order to make enough cake for everyone.

You may have students show their work on a seperate piece of paper to turn in. Remember to have them clearly show which part of the lesson they're showing the work for. If they have a smartphone, they can take a picture of the work and upload it to their folder (titled, "Cooking for How Many").

When students are done, they can click on the "Check" button at the bottom right. The worksheet will correct all of the parts for you (yay!). Any incorrect answer will be highlighted red and students must go back to correct them before the "Print" button is displayed. When all parts are correct (highlighted light green), the student can click print. A print dialogue will pop up and students can print it as a pdf document. Some adjustments should be made to format the page correctly. It is recommended that "tabloid" page size be chosen to have the webpage print correctly.


The Recipe (5 Points)
Points will be deducted for any of the following:

Part I Total: ________

The Work (15 Points)
Points will be deducted for any of the following:

Part II Total: ________

Organization (5 Points)
Points will be deducted for any of the following:

Part III Total: ________

Feel free to weigh the project (pointwise) how you see fit. In addition, add or take away anything in the rubric that you don't feel is appropriate for your class. In addition, you can use this as an idea to create for yourself a lesson that better fits your student population.


If students decide that they want to make their cake and bring it to class, that would be awesome! Isn't that what project-based learning is?

Example of completed work in PDF format: