Students will be able to recall basic addition and subtraction facts within 20 automaticity.

Materials

Whiteboard or board with markers

List of basic addition and subtraction facts (e.g. 1+1=2, 2+2=4, 3+3=6, 4+4=8, 5+5=10, etc.)

Index cards or small pieces of paper

Warm-up

Review the list of basic addition and subtraction facts with the students. Ask them to say the answers out loud and encourage them to answer quickly and correctly.

Draw a number line on the board or whiteboard and have the students place a sticker on the number line for each correct answer.

As students make mistakes, encourage them to think about the answer and why their answer is incorrect.

Direct Instruction

Review the list of basic addition and subtraction facts again with the students.

Explain how to add and subtract using the basic facts, using the number line as a visual aid.

Ask students to try some problems on their own using the basic facts, encouraging them to check their work and correct any mistakes.

Guided Practice

Pass out a worksheet with addition and subtraction problems within 20 using the basic facts.

Go over the answers as a class, asking students to explain how they solved each problem.

Encourage students to try some problems on their own, using the basic facts to solve the problems.

Independent Practice

Have students complete the worksheet, solving the problems using the basic facts.

Encourage students to check their answers with a partner or the class before submitting their worksheets.

Closure

Review the basic facts as a class.

Ask students to share one thing they learned about adding and subtracting within 20 during today's lesson.

Assessment

Observe students during independent practice to see if they are able to recall and use the basic facts to add and subtract within 20.

Collect and review their written work to assess their understanding of the concept.

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