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Which subject	Mathematics
What topic	Addition and subtraction within 20
What length (min)	30
What age group	Doesn't matter
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

Lesson Plan: Addition and Subtraction within 20

Topic

Addition and Subtraction within 20

Objectives

Students will be able to add and subtract numbers within 20 with accuracy.
Students will develop problem-solving skills through practice exercises.
Students will improve their mathematical reasoning and critical thinking.

Grade/Age Group

Grades 1-2 (Ages 6-8)

Subject

Mathematics

Materials

Whiteboard and markers
Math manipulatives (blocks or counters)
Worksheets for practice
Smartboard (if available)
Timer

Class Size

20 students

Duration

30 minutes

National Curriculum Alignment

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

CCSS.MATH.CONTENT.1.OA.B.3: Applying properties of operations as strategies to add and subtract.

Homework

Students will complete a worksheet with additional addition and subtraction problems not to be presented in class. The homework will be checked by the teacher discreetly.

Lesson Structure

Step Number	Step Title	Length	Details
1	Introduction to the Topic	5 mins	Briefly introduce the concept of addition and subtraction. Engage students with a question: "What happens when we combine numbers?"
2	Direct Instruction	10 mins	Demonstrate addition and subtraction with an example using the whiteboard. Use manipulatives to visualize the concepts.
3	Guided Practice	10 mins	Distribute worksheets for guided practice. Solve a few problems together as a class and encourage participation.
4	Independent Practice	3 mins	Allow students to work on the remaining problems individually. Circulate the room to offer support as needed.
5	Review and Closing	2 mins	Summarize key points of the lesson. Remind students of the importance of addition and subtraction in daily life. Mention the homework assignment.

Assessment

Monitor students during guided and independent practice to assess understanding.
Collect and review the completed worksheets during the next lesson for individual feedback.

Additional Notes

Encourage a positive learning environment where mistakes are viewed as learning opportunities.
Be prepared to provide additional support for students who need it, such as one-on-one assistance or modified worksheets.