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	2.OA.3
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

Topic

2.OA.3 - Determine the Unknown Whole Number in an Addition or Subtraction Equation

Objectives

• Students will be able to determine the unknown whole number in an addition or subtraction equation.
• Students will improve their problem-solving skills through collaborative learning.
• Students will demonstrate their understanding of equations by working through examples and completing independent practice.

Grade/Age Group

• Grade 2

Subject

• Mathematics

Materials

• Whiteboard and markers
• Worksheets with addition and subtraction equations (including a mix of equations with unknowns)
• Number lines
• Counters or small manipulatives for hands-on learning
• Timer for activity management

Number of Students

• 20

Lesson Duration

• 30 minutes

National Curriculum Alignment

• This lesson aligns with the Common Core State Standards for Mathematics, specifically 2.OA.3, which emphasizes solving real-world problems involving addition and subtraction.

Lesson Structure

Step Number	Step Title	Length	Details
1	Introduction	5 min	Briefly introduce the topic of unknowns in addition and subtraction equations. Use a simple equation to discuss as a class.
2	Guided Practice	10 min	Work through several examples as a class on the whiteboard. Encourage students to suggest how to find the unknown number. Use manipulatives to illustrate.
3	Collaborative Activity	5 min	Divide students into small groups. Give them a few problems to solve together on the whiteboard or on paper. Monitor and provide assistance as necessary.
4	Independent Practice	7 min	Distribute worksheets for individual practice. Students will solve addition and subtraction equations with unknowns on their own, ensuring they apply what they have learned.
5	Review and Homework Assignment	3 min	Quickly go over the answers to the worksheet as a class, correcting misconceptions. Assign similar problems for homework, ensuring to collect them for checking without presentations.

Assessment

• Informal assessment through observation during guided and collaborative practice.
• Review of independent worksheets to evaluate understanding and corrections before assigning homework.

Homework

• Provide students with additional equations that include unknowns for practice at home. This will reinforce the lesson and provide further opportunities to develop problem-solving skills. Collect homework the following day without presentations to assess student understanding.

Lesson script