Whole Number Beginnings

Overview

In this first lesson of the “Mastering Whole Numbers” unit, students learn to identify, read, and write whole numbers up to 1,000,000 using base 10 structures (place value) with manipulatives. They also compare numbers using what each digit means.

Learning intentions

• WALT identify and read whole numbers up to 1,000,000 using base 10 place value.
• WALT write whole numbers up to 1,000,000 from a representation.
• WALT explain how base 10 works for large numbers (ones, tens, hundreds, thousands, ten-thousands, and hundred-thousands).

Success criteria

• I can read and write whole numbers up to 1,000,000 correctly.
• I can explain what each digit means in a large whole number.
• I can represent a number using base 10 materials and then state its value.

Curriculum links

• Mathematics and Statistics — Number: understanding and representing whole numbers, including place value in larger numbers.
• Mathematics and Statistics — Problem solving and reasoning: using base 10 structures to make meaning and justify answers.
• Mathematics and Statistics — Communication: using correct mathematical language to read numbers and describe place value.
• Mathematics and Statistics — Mathematical thinking: noticing patterns in how digits change when numbers increase.

Lesson structure (30 minutes)

1. 0–4 min · Launch (Number of the day). Teacher shows a large number card (e.g., 428,305) and asks students to silently think: “How would you read this and what does the 4 stand for?” Students share one idea with a partner.

2. 4–10 min · Mini-teach: Base 10 “chunking”. Teacher models building the number 428,305 with base 10 blocks or place value discs (100, 1,000, 10,000, 100,000) and points to each place value area as reading the number aloud. Students repeat the reading and then point to the chunk that represents each digit.

3. 10–19 min · Hands-on stations (represent and write). Teacher assigns 3 short rounds (about 3 minutes each):

• Round A: Teacher calls a number (e.g., 305,720). Students build it with materials and say it to an adult.
• Round B: Students receive a built representation and write the matching numeral, then read it aloud.
• Round C: Students swap cards with a neighbour, check reading accuracy, and correct any place value mistakes. Students rotate through tasks, recording their answers on a place-value recording sheet (name the digits and write the numeral).

4. 19–26 min · Whole class: Compare with reasons. Teacher writes two numbers on the board (e.g., 513,060 and 513,506). Students use a number line or place-value reasoning to decide which is larger and why. Teacher prompts: “Which place value changed? What digit tells us first?” Students share a justification sentence frame: “It is larger because the ____ place shows ____.”

5. 26–30 min · Exit check (quick assessment). Teacher gives each student one prompt: “Build and then write: 640,205. Read it back and circle the digit that represents the thousands.” Students complete independently; teacher circulates for quick checks.

Resources

• Base 10 manipulatives for up to 1,000,000 (hundreds, thousands, ten-thousands, hundred-thousands pieces) or place-value discs
• Number cards with commas (e.g., 428,305) and numeral cards without commas for stretch readers
• Place value recording sheet (place headings: ones, tens, hundreds, thousands, ten-thousands, hundred-thousands)
• Blank number lines (optional for comparison) or place-value mats for reasoning
• Sentence starters for justification (e.g., “The ____ place shows …”)
• Sticky notes or mini whiteboards for quick responses during comparison
• Teacher observation checklist (reading, writing, explaining)

Assessment

• Teacher observation during station work: correct reading, correct building, and whether students match digits to place value.
• Formative checks during comparison: students’ reasoning based on which place value changed.
• Exit ticket: write, read, and identify the digit for a specified place (thousands), showing understanding of base 10.

Differentiation

• Visual learners: provide a large place-value chart and number line supports; use colour-coding for each place value (ones=tint, thousands=another tint).
• Tactile learners: ensure materials are within reach; allow “build first, write second” support and provide number cards that match specific pieces.
• Support for students needing extra help:
• Use worked examples: demonstrate one number build together, then have them copy the method.
• Provide partially completed recording sheets (e.g., place headings filled, student fills digits only).
• Offer sentence starters for explanations (one sentence goal).
• For students ready for more challenge:
• Use numeral without commas and ask students to show where commas should go by using place value.
• Ask “What happens to the number if you add 10 to the tens digit?” after building.
• For EAL or language support:
• Rehearse key phrases: “hundred-thousand”, “ten-thousand”, “thousand place”, “digit”, “value”.
• Allow oral responses first, then writing.

Extension (advanced learners)

• Advanced learners create a “real-life number” representation: choose a context (e.g., population, savings, distance in metres) and generate a whole number up to 1,000,000, then represent it with base 10 materials and create a 2–3 step explanation for reading it.
• Challenge question for quick finishers: “Can you make a different number with the same hundred-thousands digit? Build it and read it.”