LEARN NC

K–12 teaching and learning · from the UNC School of Education

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Learning outcomes

Students will:

  • understand the process of subtraction through hands-on manipulation of taking groups apart.
  • relate their own funny math stories to a math sentence (7-3=4).
  • begin to organize a strategy for finding differences.

Teacher planning

Time required for lesson

90 minutes

Materials/resources

  • Piggies by Don and Audrey Wood.
  • Adding mats. 2 hands on a solid background. All ten fingers need to be visible.
  • 10 Unifix cubes per student.
  • Scrap paper
  • Puff ball piggies. Piggies are made with 2 pink puff balls glued together. Use felt pipe cleaners to add piggie features.
  • 1 pair of gloves (not mittens)
  • self-adhesive velcro

Pre-activities

Prior to this, I have already introduced the concept of addition and have given them plenty of opportunities to act out stories using addition. Also, I have introduced the “math sentence” and how that sentence describes the math stories.

Activities

Day One:

  1. Read Piggies and act out with the gloves and puff ball piggies as you read. (If possible, one adult will read the book while another adult acts out the story.)
  2. Reread story. As the pigs begin to go away, stop and (orally) relate the math story to the math sentence. (For instance, “There were 10 piggies. One went away and nine were left. That would be 10-1=9.”) As the story continues, children will notice the pattern of taking away one and stating the appropriate math sentence will be easy. (Sometimes I have my children come and write the sentence on our white board or on individual chalk boards.)
  3. Review by emphasizing math sentences must correlate to the math story.

Day Two

  1. Reread story. Children may enjoy taking part in acting story out with gloves and piggies.
  2. Extend the story idea by making up your own piggie stories and writing appropriate math sentences. As you create your math stories, the children use their workmats and unifix cubes to act out the story (For example, 10-3=7.) Let the children make up their own stories. They can come up to the front of the room and act out their story and write their math sentence on the board while the children act out stories with the workmats and unifix cubes.
  3. Children extend this further by writing appropriate math sentences to student’s math stories.

Assessment

I assess the children by observing them during the activities. Most children find the activities fun and it is a great way for them to show me their understandings! Concrete assessment is done by retaining the sentences written in Part 3 of Day 2’s Activities.

Supplemental information

Related websites

For more information about Piggies, visit Audrey Wood’s website: http://www.audreywood.com/.

Comments

This lesson works best when another adult can help. My assistant and I do this together.

North Carolina Curriculum Alignment

Mathematics (2004)

Grade 1

  • Goal 1: Number and Operations - The learner will read, write, and model whole numbers through 99 and compute with whole numbers.
    • Objective 1.03: Develop fluency with single-digit addition and corresponding differences using strategies such as modeling, composing and decomposing quantities, using doubles, and making tens.
    • Objective 1.04: Create, model, and solve problems that use addition, subtraction, and fair shares (between two or three).