Activity 01
Inquiry Circle: The Part-Whole Hula Hoop
Place two small hoops inside a large one. Students work in groups to distribute a set number of beanbags into the two small hoops (the parts) and then move them all into the large hoop (the whole) to see the total.
How many different ways can we split the number 5 into two parts?
Facilitation TipDuring The Part-Whole Hula Hoop, stand inside the hoop yourself to model what happens when a student becomes the 'whole' and others represent the parts.
What to look forShow students a part-whole model with the whole number 5 and one part (e.g., 3). Ask students to draw the missing part in the other circle and write the complete number bond equation (e.g., 3 + 2 = 5).
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Activity 02
Think-Pair-Share: Snap Cube Break
Give pairs a tower of 10 cubes. One student snaps the tower into two pieces behind their back and shows one piece. The partner must use their knowledge of number bonds to name the hidden 'part' before checking.
Why does knowing one number bond help us find many others?
Facilitation TipIn Snap Cube Break, encourage students to snap cubes together only after naming the two parts aloud to reinforce verbalizing the bond.
What to look forGive each student a card with a number from 1 to 4. Ask them to write down two different number bonds that include their number as a part. For example, if they have '2', they could write '2 + 3 = 5' and '1 + 2 = 3' (if extending to other wholes) or focus only on 5 and write '2 + 3 = 5' and '4 + 1 = 5' if their number is 1.
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Activity 03
Gallery Walk: Number Bond Posters
Groups create posters showing all the ways to make a specific number (e.g., 6). They use drawings, stickers, and number sentences. Students then walk around to check if any combinations were missed by their peers.
What is the relationship between a part and a whole?
Facilitation TipFor Number Bond Posters, assign each pair a different color marker so you can track contributions and identify who needs support.
What to look forPresent the equation 5 - 2 = 3. Ask students: 'What addition fact does this subtraction fact help us remember?' Guide them to connect it to the number bond 2 + 3 = 5.
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Generate Complete Lesson→A few notes on teaching this unit
Teach number bonds by starting with concrete objects before moving to abstract equations. Always connect spoken language to written symbols, and avoid rushing to formal notation before students can explain the relationships in their own words. Research shows that children who physically manipulate objects develop stronger mental models for number relationships.
By the end of these activities, students should confidently decompose 5 into all possible pairs and explain the relationship between addition and subtraction using number bonds. They should also recognize that a whole can be split in more than one way.
Watch Out for These Misconceptions
During The Part-Whole Hula Hoop, watch for students who assume the largest number must be the whole.
Remind them that the whole is the total they counted together, so rearrange the hoops to show different groupings (e.g., 2 and 3 can become 4 and 1) and ask them to recount the whole to confirm.
During The Part-Whole Hula Hoop, watch for students who think a number can only be split into two parts.
Use three small hoops laid out on the floor. Have students stand in one hoop and place 5 beanbags in the other two hoops to show 5 can be made of three parts, like 1, 2, and 2.
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