Title: Adding and Subtracting Unlike Fractions

Grade Level: 5

Learning Objectives:

1. Students will be able to add unlike fractions.

2. Students will understand the process of finding the least common denominator.

3. Students will be able to calculate common denominators.

4. Students will be able to subtract unlike fractions.

Teaching Strategies and Materials:

1. Introduction (10 minutes)

– Begin with a brief review of fractions, including how to find the numerator and denominator.

– Introduce the concept of adding and subtracting unlike fractions.

– Show visual aids such as fraction bars and manipulatives to help students understand.

2. Finding the Least Common Denominator (15 minutes)

– Explain the concept of least common denominator.

– Demonstrate how to find the least common denominator by finding the LCM of the denominators.

– Provide examples and practice problems for students to complete.

3. Calculating Common Denominators (15 minutes)

– Explain how to calculate common denominators.

– Show examples and model the process for students.

– Provide practice problems for students to complete on their own or in small groups.

4. Adding Unlike Fractions (20 minutes)

– Review the steps for finding the least common denominator and calculating common denominators.

– Model how to add unlike fractions using the common denominator.

– Provide examples and practice problems for students to complete independently or in pairs.

5. Subtracting Unlike Fractions (20 minutes)

– Review the steps for finding the least common denominator and calculating common denominators.

– Model how to subtract unlike fractions using the common denominator.

– Provide examples and practice problems for students to complete independently or in pairs.

Assessment Strategies:

1. Formative Assessment:

– Observe and provide feedback during independent work time and partner/group work.

– Use exit tickets or quick checks to assess understanding of concepts throughout the lesson.

2. Summative Assessment:

– Provide written or online assessments that assess the ability to add and subtract unlike fractions using the least common denominator and common denominators.

– Allow students to demonstrate their understanding through problem-solving activities or projects.

Accommodations for Diverse Learners:

1. Provide visual aids, such as fraction bars or manipulatives, to help students understand.

2. Use multiple modes of instruction, including visual, auditory, and kinesthetic.

3. Break down complex steps into smaller, more manageable chunks.

4. Assign partners or small groups for peer support and collaboration.

5. Provide extra practice or alternative assessments for those who need it.

Materials Needed:

– Chalkboard or whiteboard

– Chalk or markers

– Visual aids (fraction bars, manipulatives)

– Worksheets and/or online activities

– Summative assessment materials

Lesson Outline:

Introduction (10 minutes)

– Brief review of fractions

– Introduction to adding and subtracting unlike fractions

– Visual aids to help students understand

Finding the Least Common Denominator (15 minutes)

– Explanation of least common denominator

– Demonstration of finding LCM

– Examples and practice problems

Calculating Common Denominators (15 minutes)

– Explanation of calculating common denominators

– Modeling process

– Practice problems

Adding Unlike Fractions (20 minutes)

– Review of finding LCM and calculating common denominators

– Model of adding unlike fractions

– Examples and practice problems

Subtracting Unlike Fractions (20 minutes)

– Review of finding LCM and calculating common denominators

– Model of subtracting unlike fractions

– Examples and practice problems

Conclusion (5 minutes)

– Review of key concepts

– Opportunity for questions and clarifications