numbers

Objective: Students will be able to solve addition story problems with unknown start numbers.

Materials: Paper and pencils, dry erase board and markers, overhead projector

Introduction (5 minutes):

• Discuss the definition of an addition story problem
• Explain what an unknown start number is and how it differs from a known start number
• Go through an example of an addition story problem with an unknown start number

Guided Practice (15 minutes): - Pose a few addition story problems with unknown start numbers for students to solve - For each problem, have the students write down their answer on their paper, and then explain the steps they used to get to the answer - Have the students share their solutions and have the group discuss any different approaches or methods

Independent Practice (20-30 minutes): - Give the students a worksheet with several addition story problems with unknown start numbers - Walk around and observe the students to ensure understanding and help with any questions

Closure (5 minutes):

• Ask the students to summarize what they learned
• Have the students discuss how they can use this skills in real world scenarios
• Pose a final question with an unknown start number that the students can work on together
• Discuss any questions or concerns the students may have

Evaluation:

• Evaluate the students’ worksheets to ensure understanding