Contextualization
The Greatest Common Factor (GCF) is a fundamental concept in mathematics. It is the largest number that evenly divides two or more numbers. In other words, the GCF is the largest common divisor. It is a crucial concept for simplifying fractions, reducing fractions, and solving algebraic equations.
The GCF is a concept we encounter in our everyday life, often without realizing it. For example, when baking, you may need to divide a recipe to make a smaller batch. The GCF could help you determine how much of each ingredient to use. Similarly, when sharing items among friends or siblings, finding the GCF can help ensure everyone gets an equal share.
This project will not only help you understand the mathematical concept of GCF but also its realworld application. You will learn to use the GCF to solve problems and make calculations more efficient.
To get a deeper understanding of the GCF, you can explore these resources:
 Khan Academy: Greatest Common Divisor  An excellent video resource to understand the GCF and its computation.
 Math is Fun: Factors and Multiples  This page explains what factors are and how they relate to the GCF.
 IXL Learning: GCF  A collection of interactive problems to practice finding the GCF.
 Book: "Math Dictionary: Your Guide to the Math Language of Middle School" by Eula Ewing Monroe  This book has a comprehensive explanation of the GCF along with other important math terms.
By the end of this project, you will not only have a deep understanding of the GCF but also learn valuable skills such as problemsolving, collaboration, and time management. Let's dive into the exciting world of the GCF!
Practical Activity
Activity Title: Exploring the Greatest Common Factor
Objective of the project:
The main objective of this project is for students to understand the concept of the Greatest Common Factor (GCF) and its application in realworld scenarios. Additionally, the project aims to enhance the students' teamwork, problemsolving, and creative thinking skills.
Detailed Description of the Project:
In groups of 3 to 5, students will create a GCF Calculator using everyday objects. Each object will represent a number, and the GCF Calculator will be used to find the Greatest Common Factor of these numbers. Each group will then create a story or scenario that demonstrates the application of the GCF in a realworld context using their GCF Calculator.
Necessary materials:
 A variety of small, identical objects (such as buttons, beads, or coins)
 A large sheet of paper
 Markers or colored pencils
 A calculator (for crosschecking purposes)
Detailed stepbystep for carrying out the activity:
Step 1: Introduction to the Concept of GCF (Estimated time: 30 minutes)
The teacher will start by introducing the concept of GCF using the resources provided earlier. The teacher will explain the realworld applications of GCF and its importance in mathematics and daily life.
Step 2: Forming Groups and Assigning Numbers (Estimated time: 10 minutes)
Students will form groups of 3 to 5. Each group will be assigned three or more numbers. These numbers will be represented by the small, identical objects provided.
Step 3: Creating the GCF Calculator (Estimated time: 30 minutes)
Using the assigned numbers, each group will create a GCF Calculator on the large sheet of paper. The GCF Calculator should clearly show the process the group will use to find the GCF of the numbers.
Step 4: Finding the GCF (Estimated time: 30 minutes)
Using the GCF Calculator, each group will find the GCF of their assigned numbers. They will doublecheck their answer using a calculator.
Step 5: Creating a RealWorld Scenario (Estimated time: 30 minutes)
Each group will create a story or scenario that demonstrates the application of the GCF in a realworld context. The scenario should involve the numbers from the GCF Calculator.
Step 6: Presentation (Estimated time: 20 minutes per group)
Each group will present their GCF Calculator and realworld scenario to the class. They will explain the process they used to find the GCF and how it applies to their scenario.
Project Deliverables:
At the end of the project, each group will submit a report containing the following sections:

Introduction: A brief overview of the GCF, its importance, and realworld application. They should also describe the objective of this project.

Development: A detailed explanation of the GCF Calculator they created, including a stepbystep description of how they used it to find the GCF. They should also explain the realworld scenario they created and how it relates to the GCF.

Conclusion: A summary of the main points of the project, including the process they used to find the GCF, the results they obtained, and the lessons they learned.

Bibliography: A list of the resources they used to learn about the GCF and to create their GCF Calculator.
The report should be typed, with clearly labeled sections. The development section should include sketches or photos of their GCF Calculator and scenario. The report should be a collaborative effort, with each group member contributing to every section. The report should be detailed enough to explain not only what they did, but why and how they did it. Students should make connections between the GCF and its realworld applications, and reflect on their learning experience.