Mathematics · Primary 1

Active learning ideas

Counting in Tens to 100

Active learning works well for counting in tens because students need to see and feel the pattern of tens to grasp its structure. Movement and hands-on materials reinforce the skip-counting rhythm, making abstract numbers concrete. This approach builds confidence as students notice consistent patterns in the numbers they count.

• MOE Syllabus Outcomes
• MOE: N(iv).3

• 20–35 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Think-Pair-Share
• 30 min · Small Groups

Bundle Builders: Straw Tens

Provide drinking straws or popsicle sticks. In small groups, students bundle them into sets of 10, then count forward from a starting bundle like 30 to 100. Switch to backward counting from 80, recording totals on group charts. Discuss patterns observed.

What pattern do we notice when counting in tens?

Facilitation Tip

During Bundle Builders, circulate and ask students to explain how many tens they have bundled and how many ones remain loose.

What to look for

Show students a card with a multiple of ten, like 30. Ask them to write the next three numbers when counting forward by tens. Then, show 70 and ask them to write the previous three numbers when counting backward by tens.

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

Activity 02

• Think-Pair-Share
• 25 min · Pairs

Number Line Relay: Tens Race

Mark a floor number line from 0 to 100 in tens. Pairs take turns hopping from a starting multiple of 10, calling out numbers forward or backward. First pair to reach end or zero wins a point. Rotate starters.

How does counting in tens help us count large groups of objects quickly?

Facilitation Tip

In Number Line Relay, pause after each round to have students chant the sequence they just ran together.

What to look for

Present a collection of 50 small objects (e.g., counters) bundled into groups of ten. Ask students: 'How many groups of ten do you see? How can we count them quickly using tens? What do you notice about the last digit of each number as we count by tens?'

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

Activity 03

• Think-Pair-Share
• 20 min · Pairs

Ten-Frame Flip: Pattern Cards

Prepare cards with ten-frames showing multiples of 10 up to 100. Students in pairs flip cards and count forward or backward in sequence. Use dry-erase boards to extend chains beyond 100 if ready. Share longest chains class-wide.

Can we count backward in tens? How?

Facilitation Tip

For Ten-Frame Flip, model how to record each flip as an equation, such as 30 + 10 = 40, to connect counting to written math.

What to look for

Give each student a worksheet with two sections. Section 1: Start at 20, count forward by tens to 100. Section 2: Start at 90, count backward by tens to 10. Students complete both sequences.

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

Activity 04

• Think-Pair-Share
• 35 min · Small Groups

Market Count: Group Shopping

Set up a class market with items in tens (e.g., 10 pencils per pack). Small groups 'shop' by counting packs forward/backward to total 100 items. Tally and compare group totals.

What pattern do we notice when counting in tens?

Facilitation Tip

At Market Count, provide a limited number of items so students experience the need to count in tens to tally totals efficiently.

What to look for

Show students a card with a multiple of ten, like 30. Ask them to write the next three numbers when counting forward by tens. Then, show 70 and ask them to write the previous three numbers when counting backward by tens.

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

A few notes on teaching this unit

Start with concrete materials like straws or linking cubes to build tens, as research shows this helps students internalize place value. Move to representational tools like number lines only after students can count and group objects in tens confidently. Avoid rushing to abstract symbols before students understand the grouping concept. Use choral counting and partner turns to build fluency and reduce anxiety about mistakes.

Successful learning looks like students counting forward and backward by tens without hesitation, recognizing the zero pattern in the ones place. They should explain how grouping objects in tens helps count large quantities quickly. Partner discussions should include clear reasoning about the patterns they observe.

---

Watch Out for These Misconceptions

• During Bundle Builders, watch for students counting each straw one by one instead of grouping by tens.

  Prompt students to bundle straws in groups of ten and physically move the bundle past the next ten while skipping the ones place aloud. Ask, 'How many tens did you move? What number comes next?' to redirect their attention.

• During Number Line Relay, watch for students losing track of the direction when counting backward.

  Have students point to the number line with their finger while chanting backward steps together. Use a colored arrow on the line to mark direction and ask, 'Is the next number bigger or smaller than the one before?'

• During Bundle Builders or Ten-Frame Flip, watch for students treating tens as single units without understanding they represent ten ones.

  Ask students to dismantle a bundle or flip a ten-frame back to ones, then recount to show ten individual units. Use linking cubes to snap apart and reassemble, emphasizing the composition during sharing time.

---

Methods used in this brief

• Think-Pair-Share