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Which subject	Mathematics
What topic	Adding and subtracting rational expressions
What length (min)	40
What age group	Year or Grade 11
Class size	30
What curriculum	NYS Common Core Algebra 2
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Check previous homework
Ask some students to presents their homework
Add a physical break
Add group activities
Include homework
Show correct answers
Prepare slide templates
Number of slides	5
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Lesson plan

Lesson Plan: Adding and Subtracting Rational Expressions

Topic

Adding and Subtracting Rational Expressions

Objectives

• Understand the concept of rational expressions.
• Learn how to find a common denominator for rational expressions.
• Perform addition and subtraction of rational expressions.
• Simplify rational expressions after addition or subtraction.

Materials

• Whiteboard and markers
• Projector and screen for presentations
• Handouts with practice problems
• Graphing calculators (optional)
• Access to digital learning tools (if available)

Grade/Age Group

• Grade 11

Subject

• Mathematics

Length of Lesson

• 40 minutes

Class Size

• 30 students

National Curriculum

• NYS Common Core Algebra 2

Lesson Structure

Step Number	Step Title	Length	Details
1	Introduction to Rational Expressions	5 minutes	Briefly explain what rational expressions are with examples.
2	Finding the Common Denominator	10 minutes	Teach how to identify the least common denominator (LCD) for given expressions. Show examples on the board.
3	Adding Rational Expressions	10 minutes	Demonstrate the process of adding rational expressions step by step, including simplifying.
4	Subtracting Rational Expressions	10 minutes	Demonstrate the subtraction of rational expressions, again focusing on simplifying results.
5	Practice Problems	5 minutes	Distribute handouts with practice problems. Allow students to work in pairs to solve them.
6	Homework Explanation	5 minutes	Explain homework assignments without calling on students. Assign similar practice problems for reinforcement.

Assessment

• Monitor student participation during practice problems.
• Review completed homework for understanding and correctness without individual presentations.

Homework

• Complete assigned problems from the handout related to adding and subtracting rational expressions.

Additional Notes

• Encourage students to ask questions throughout the lesson to enhance understanding.
• Consider using digital tools or software for additional visual examples if time permits.

Lesson script