Counting and Place Value to 199 · Autumn Term

Ordering and Comparing Numbers to 199

Comparing and ordering integers, fractions, decimals, and percentages, including on a number line.

Key Questions

  1. What does it mean for one number to be greater than or less than another?
  2. How can you put a set of numbers in order from smallest to largest?
  3. Can you use the symbols > and < to compare two numbers up to 199?

NCCA Curriculum Specifications

NCCA: Junior Cycle - Number - N.1.2NCCA: Junior Cycle - Number - N.1.3
Class/Year: 2nd Class
Subject: Mathematical Explorers: Building Foundations
Unit: Counting and Place Value to 199
Period: Autumn Term

Suggested Methodologies

Think-Pair-Share

Individual reflection, then partner discussion, then class share-out

10–20 min

Learn more about Think-Pair-Share

Collaborative Problem-Solving

Structured group problem-solving with defined roles

25–50 min

Learn more about Collaborative Problem-Solving

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Planning templates for Mathematical Explorers: Building Foundations

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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.

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Math 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.

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Math 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

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

Tens and Units — Building Numbers

Exploring the concept of numbers below zero in real-world contexts like temperature and debt.

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

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