Tens and Units — Building Numbers
Exploring the concept of numbers below zero in real-world contexts like temperature and debt.
Key Questions
- What are the tens and units in a two-digit number?
- How can you build a number using tens rods and unit cubes?
- Can you swap between the expanded form (e.g., 30 + 7) and the standard form (37) of a number?
NCCA Curriculum Specifications
Suggested Methodologies
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Planning templates for Mathematical Explorers: Building Foundations
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerMath Unit
Plan a multi-week math unit with conceptual coherence: from building number sense and procedural fluency to applying skills in context and developing mathematical reasoning across a connected sequence of lessons.
rubricMath Rubric
Build a math rubric that assesses problem-solving, mathematical reasoning, and communication alongside procedural accuracy, giving students feedback on how they think, not just whether they got the right answer.
More in Counting and Place Value to 199
Exploring Number Systems: Beyond Base 10
Investigating different number bases (e.g., binary, base 5) to deepen understanding of place value and number representation.
2 methodologies
Ordering and Comparing Numbers to 199
Comparing and ordering integers, fractions, decimals, and percentages, including on a number line.
2 methodologies
Odd and Even Numbers
Identifying patterns in arithmetic and geometric sequences, and deriving rules for the general term.
2 methodologies
Number Patterns and Skip Counting
Rounding numbers to a specified number of significant figures and decimal places, and understanding their application in estimation.
2 methodologies
Before, After, and Between Numbers
Finding the highest common factor (HCF) and lowest common multiple (LCM) of two or more numbers using prime factorisation.
2 methodologies