Full lesson	Create for a teacher a set of content for giving a lesson, beginning with the lesson plan. Each new block of materials must begin with an H1 heading (other subheaders must be H2, H3, etc). When you describe required pictures, write those descriptions in curly brackets, for example: {A picture of a triangle}
Which subject	Mathematics
What topic	congruent triangles
What length (min)	30
What age group	Year or Grade 10
Class size	20
What curriculum
Include full script
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
Create fill-in cards for students
Create creative backup tasks for unexpected moments

Lesson plan

Topic

Congruent Triangles

Objectives

1. Understand the definition of congruent triangles.
2. Identify corresponding parts of congruent triangles.
3. Apply the criteria for triangle congruence: SAS, SSS, AAS, and ASA.
4. Solve problems involving congruent triangles.

Materials

• Whiteboard and markers
• Geometry textbooks
• Ruler and compass
• Worksheets with practice problems
• Geometry software or applications (optional)

Grade/Age Group

Year/Grade 10

Subject

Mathematics

Class Size

20 students

Length of Lesson

30 minutes

National Curriculum Standards

The lesson aligns with the Common Core State Standards for Mathematics, specifically:

• CCSS.MATH.CONTENT.HSG.SRT.B.5: Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

Lesson Structure

Step Number	Step Title	Length (Minutes)	Details
1	Introduction	5	Briefly introduce the topic of congruent triangles. Explain the importance and applications.
2	Direct Instruction	10	Present the definition of congruent triangles and introduce the congruence criteria (SAS, SSS, AAS, ASA) with examples.
3	Guided Practice	5	Work on a couple of examples together as a class. Demonstrate how to identify congruent triangles and apply the criteria.
4	Independent Practice	5	Distribute worksheets with practice problems. Students work individually while the teacher circulates for support.
5	Homework Assignment Review	5	Go over the homework from the previous lesson, checking answers without student presentations. Discuss common mistakes.
6	Closing and Questions	5	Recap the key concepts learned. Open the floor for student questions and clarify any doubts.

Homework

• Assign a set of problems from the textbook related to congruent triangles and their criteria. Students will turn it in during the next class for feedback.

Lesson script