Introduction
Welcome to Mrs. Benedict's In-Class Bakery! Mrs. Benedict wants to make treats for all the students in the class, but she does not have enough ingredients to make a whole batch of each treat. She needs help figuring out how to adjust the recipes so that she can make treats without running out of ingredients.
Task
Your task is to figure out how to halve each recipe so Mrs. Benedict does not run out of ingredients. You will be using your knowledge of multiplying fractions to adjust the recipe measurements. It is important for you to multiply correctly because at the end of this webquest you will be using your modified recipes to create treats for the class. It's up to you to impress your classmates with your fraction knowledge and tasty baking skills.
Process
Phase One: Fraction Foundations
In order to modify your recipes appropriately you will have to know how to multiply fractions. Use the steps below to review and practice your fraction skills. Group members can work together to complete the practice sections.
1. Review how to multiply fractions by whole numbers by watching the following video:
2. Practice multiplying fractions by whole numbers using the following link:
https://www.ixl.com/math/grade-4/multiply-unit-fractions-by-whole-numbers-using-models
3. Review how to multiply fractions by fractions by watching the following video:
4. Practice multiplying fractions by fractions by using the following link:
https://www.ixl.com/math/grade-5/multiply-two-unit-fractions-using-models
Phase Two: Recipe Selection and Modification
Choose a recipe as a group from the following choices and multiply it by 1/2. Each group member should be sure to do their own mathematical calculations. Compare answers with your group members and then type the new recipe into one google document. Share the document with Mrs. Benedict and the rest of the peers in your group. Use your collaboration skills to decide how each group member can contribute equally to this process.
1. No-Bake Energy Bites: http://allrecipes.com/recipe/239969/no-bake-energy-bites/
2. No-Bake Party Mix Recipe: http://www.tasteofhome.com/recipes/no-bake-party-mix
3. Microwave Rice Krispies Treats: http://www.food.com/recipe/microwave-rice-krispies-treats-31981
Phase Three: Visual Recipe
Create a visual representation of how you figured out the fractions for your new recipe using FlockDraw. Each group member is responsible for at least one visual representation. Once you have drawn and labeled your representations, copy the link and paste it into your google document. You may do individual links for each fraction or put them all on one drawing. See an example of a visual representation below.
Example: http://flockdraw.com/gallery/view/2338027
Evaluation
| 1 point | 2 points | 3 points | Total | |
| Collaboration | I didn't collaborate. I let my teammates do all the work. |
I helped my team with some parts, but I could have done more. |
My peers and I made a great team. We each did our job well. | |
| Recipe Conversion | Most of our fraction conversions were incorrect. | Some of our fractions were converted correctly. | All of our fractions were converted correctly. | |
| Visual Representation | Our visual representation was confusing and/or incorrect. | Our visual representation was partially correct or was missing a part. | Our visual representation was complete and easy to understand. | |
| Reflection | My reflection lacked detail and/or did not address the given prompts. | My reflection answered some of the prompts, but could use more detail. | My reflection was well thought out and answered all the prompts. |
Conclusion
Your knowledge of fractions isn't just a skill you have to learn so you can do well in school. It is a life skill! Practicing with real life fractions, such as in baking, is a great way for you to continue to grow in your knowledge about fractions. Using visual models is also a good way to help you deepen your understanding and demonstrate how fractions work. As a conclusion to this webquest, we will be making your converted recipes and trying them. If you have done your math correctly we will have delicious treats to enjoy!
Credits
Kaelyn Kraft created a webquest called Fractions in Baking on zunal.com that helped me with some ideas of how to format this webquest.
Teacher Page
This webquest was designed for 4th and 5th graders to help them connect multiplication of fractions to the real life scenario of baking. It was also designed to help students develop visual representations of fractional parts in order to solidify understanding of fractions and multiplication of fractions. The main part of the webquest will take approximately 3 hours, depending on how familiar your students already are with the integrated technology pieces, such as Google documents and FlockDraw. The baking part could take an additional hour, but is a recommended conclusion to the webquest as a practical application of skills.
*This webquest assumes students will have already been introduced to fractions and have a basic understanding of addition and subtraction of fractions. Multiplication of fractions may have been introduced already as well, depending on the level of students you are working with.
*The recipes chosen vary in difficulty with the No-Bake Energy Bites being the most challenging and the Microwave Rice Krispies Treats being the easiest. You may wish to assign recipes based on ability and group students accordingly.
Standards
CCSS.Math.Content.4.NF.B.4.a
Understand a fraction a/b as a multiple of 1/b. For example, use a visual fraction model to represent 5/4 as the product 5 × (1/4), recording the conclusion by the equation 5/4 = 5 × (1/4).
CCSS.Math.Content.5.NF.B.4.a
Interpret the product (a/b) × q as a parts of a partition of q into b equal parts; equivalently, as the result of a sequence of operations a × q ÷ b. For example, use a visual fraction model to show (2/3) × 4 = 8/3, and create a story context for this equation. Do the same with (2/3) × (4/5) = 8/15. (In general, (a/b) × (c/d) = (ac)/(bd)