Mathematics · Class 2

Active learning ideas

Regrouping Concepts in Addition

Active learning helps children grasp regrouping because it turns abstract symbols into concrete actions. When students physically exchange ten ones for one ten using blocks or straws, they see why the total value does not change despite the shift in grouping. This hands-on experience builds a strong foundation before moving to abstract recording of sums.

• CBSE Learning Outcomes
• CBSE: Addition and Subtraction with Regrouping - Class 2

• 20–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Think-Pair-Share
• 30 min · Pairs

Manipulative Exchange: Base-Ten Addition

Provide base-ten blocks and number cards for pairs to add. Students build each addend, combine ones, and exchange ten ones for a ten rod when needed. They write the equation and sum on worksheets, then swap with another pair to verify.

When we have more than nine ones, why must we move them to the tens place?

Facilitation Tip

During Manipulative Exchange, have students work in pairs so one counts while the other records, ensuring both understand the process.

What to look for

Present students with addition problems like 27 + 15. Ask them to use base-ten blocks to solve it. Observe if they correctly exchange ten ones for one ten and place it in the tens column.

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Activity 02

• Stations Rotation
• 45 min · Small Groups

Stations Rotation: Regrouping Stories

Set up three stations with word problems involving toys or sweets. At each, small groups use blocks to act out addition, regroup, and draw their solution. Groups rotate every 10 minutes and share one insight with the class.

How can we use blocks to visualize the process of regrouping in addition?

Facilitation Tip

For Station Rotation, place a timer visible to all to keep groups moving and maintain energy levels across tasks.

What to look for

Give each student a card with a problem like 18 + 6. Ask them to draw the base-ten blocks before and after regrouping, and write the final sum. Check if their drawings accurately show the exchange.

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Activity 03

• Think-Pair-Share
• 25 min · Whole Class

Regrouping Relay: Whole Class Challenge

Divide class into teams. Each student adds a pair of numbers using personal sets of blocks or drawings, regroups if needed, and passes to the next. First team to complete correctly wins; discuss errors as a class.

Explain why regrouping does not change the total value of the number.

Facilitation Tip

In Regrouping Relay, assign roles like 'block holder' and 'scribe' to ensure every child participates actively in the process.

What to look for

Ask students: 'Imagine you have 12 apples and your friend gives you 9 more. How can you group them to easily count the total? Explain why grouping ten apples together helps.'

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Activity 04

• Think-Pair-Share
• 20 min · Individual

Individual Block Journal: Personal Regrouping

Students select five addition problems from a sheet. They use blocks to solve each, noting before and after regrouping sketches in journals. End with a self-check against answer keys.

When we have more than nine ones, why must we move them to the tens place?

What to look for

Present students with addition problems like 27 + 15. Ask them to use base-ten blocks to solve it. Observe if they correctly exchange ten ones for one ten and place it in the tens column.

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

A few notes on teaching this unit

Teach regrouping by starting with manipulatives before introducing symbols. Use everyday language like 'bundling' or 'exchanging' rather than 'carrying' to avoid confusion with subtraction terminology. Model errors yourself and ask students to find and correct them, as this builds metacognitive skills. Research shows children learn best when they verbalise their steps while working, so encourage them to narrate their actions aloud as they regroup.

Students will confidently exchange ten ones for one ten when the ones column exceeds nine and record the sum correctly. They will explain why regrouping is needed and how it maintains the total value. Their work will show clear models and accurate exchanges in both manipulatives and written form.

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Watch Out for These Misconceptions

• During Manipulative Exchange, watch for students who think exchanging ten ones for one ten means losing value.

  Have them recount the blocks after exchange and write both counts (e.g., 15 ones = 1 ten 5 ones) to see the equivalence in action.

• During Station Rotation, listen for groups that regroup even when ones total less than ten.

  Ask them to compare their models side by side with problems that do require regrouping to highlight when it is truly necessary.

• During Regrouping Relay, watch for students who believe the carried ten adds new value to the total.

  Have them recount the blocks before and after the exchange to see that the ten comes from the ones already present and does not change the total count.

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Methods used in this brief

• Think-Pair-Share
• Stations Rotation