Subitising and Comparing

Overview

Today focuses on building number sense for Year 0 learners by subitising small quantities (not counting) and comparing collections using more, less, and equal. Students practise recognising 1–5 dots, then link this to matching and comparing objects.

Learning intentions

• WALT subitise quantities of 1–5 by recognising them instantly.
• WALT compare two collections using one-to-one matching to say more, less, or equal.
• WALT use number talk language (more, less, equal) to explain thinking.
• WALT represent quantities with dots, objects, and numeral cards.

Success criteria

• I can look at a dot card (1–5) and tell how many without counting.
• I can match objects one-to-one and say which collection has more, less, or the same (equal).
• I can find the correct numeral card for a small dot pattern.
• I can explain my answer using “more”, “less”, or “equal”.

Curriculum links

• Number and Algebra: students develop early number sense and understand that numbers represent quantities.
• Te reo and language competence supports using precise mathematical words such as more, less, and equal.
• Mathematical thinking: students use reasoning, representations, and communication to make and test ideas.
• Learning through play and purposeful talk supports engagement with counting and number structure foundations.

Lesson structure (60 minutes)

1. 0–5 min · Settling and number talk. Teacher shows dot cards with 1–5 dots, one at a time, and asks “How many dots can you see?” without counting. Students respond with a hand signal or spoken number.

2. 5–15 min · Explicit teaching: what subitising means. Teacher explains that subitising is “spotting” how many without counting, and models with dot frames (show 2 different arrangements of 3, 4, 5). Students look, say the quantity, and repeat a simple routine: “I see… (not counting).”

3. 15–25 min · Guided practice: dot frames to numeral cards. Teacher places dot frames on the floor or board, pairs each with a numeral card (1–5), and demonstrates “spot and match”. Students come up in small groups, match one card pair, and share briefly what they saw.

4. 25–35 min · Main activity: matching game (dots to numerals). Teacher sets up a matching game at tables: dot cards (1–5) and numeral cards (1–5). Students work in pairs, turn over one dot card, subitise, then find the matching numeral card. Teacher circulates, prompting with “Tell me how you knew.”

5. 35–47 min · Comparing collections using more/less/equal. Teacher displays two small collections (e.g., 4 cubes and 3 cubes; then 2 counters and 2 counters). Teacher models one-to-one matching and verbalising: “I match one to one… this one has more / less / equal.” Students practise with a “match-and-say” routine on mini mats.

6. 47–56 min · Partner task: create and compare. In pairs, students create two collections using objects (counters, cubes, buttons) within 1–5. They compare using one-to-one matching and place the correct language card: more, less, or equal. Each pair shares one example with the class using a complete sentence stem: “I think ___ because I matched ___ to ___.”

7. 56–60 min · Exit check and reflection. Teacher flashes 3 quick dot cards (1–5). Students show their answer with fingers or number cards. Final prompt: “Which is bigger—more, less, or equal? How did you know?”

Resources

• Dot cards (1–5) and numeral cards (1–5)
• Dot frames (two or more arrangements per number up to 5)
• Small objects: counters, cubes, buttons, play bricks (enough for whole class in pairs)
• Language cards: more, less, equal (one set per group)
• Floor mini-mats or trays for one-to-one matching
• Whiteboard or chart paper for teacher modelling
• Teacher sticky notes for quick feedback
• Optional: small timer for game rounds

Assessment

• Observe subitising in the starter and matching game: can students identify 1–5 quantities without counting?
• Check comparing strategies: do students use one-to-one matching and use the correct words more, less, equal?
• Quick exit check with three dot-card flashes to confirm instant recognition of 1–5.

Differentiation

• Support:
• Provide sentence stems: “I see ___.” “More because…” “Equal because…”
• Use dot frames and grouped subitising visuals (e.g., structured arrangements like five on a dice pattern).
• Reduce the number range to 1–3 for some students, then gradually extend to 4–5.
• Extension:
• Ask students to show two different dot arrangements for the same number and still name it instantly (e.g., “Show me 4 in a different way.”).
• Challenge students to explain whether two different objects can still be equal (e.g., “Different objects, same number.”).
• EAL/SEN considerations:
• Keep language consistent with key word cards (more/less/equal) and model repeatedly with gestures.
• Allow non-verbal responses (finger counts or number card picks) when needed, then encourage oral explanation through prompting.