Mathematics · Year 1 · Problem Solving and Reasoning · Term 4

Identifying Key Information

Learning to identify and extract important numbers and words needed to solve a problem, and disregard irrelevant information.

• ACARA Content Descriptions
• AC9M1A02

About This Topic

Identifying key information equips Year 1 students to tackle word problems by selecting essential numbers, quantities, and action words while setting aside irrelevant details. For example, in a problem like 'Tom has 5 apples. He sees 3 birds. His friend gives him 2 more apples. How many does Tom have now?', students learn to focus on 5, 2, and 'gives him more apples', ignoring birds. This directly supports AC9M1A02, which emphasises representing and solving addition and subtraction problems from practical situations.

Within problem solving and reasoning, this skill builds careful reading habits and logical analysis. Students connect it to everyday scenarios, such as sharing toys or counting classroom items, fostering confidence in multi-step tasks. It lays groundwork for interpreting complex data in later years.

Active learning benefits this topic greatly. When students physically circle or sort key elements on charts, or discuss choices in pairs, they practice discrimination through tangible actions. These approaches clarify thinking, reduce overwhelm, and make success visible, leading to stronger retention and application.

Key Questions

1. Analyze which numbers and words in this problem are important for finding the answer.
2. Circle the key information you need to solve this problem.
3. Explain why some words or numbers in a problem might not be important.

Learning Objectives

• Identify the relevant numbers and words needed to solve a given word problem.
• Explain why certain numbers or words in a word problem are not needed to find the solution.
• Circle the key information required to accurately solve a mathematical word problem.
• Categorize information in a word problem as relevant or irrelevant for problem-solving.

Before You Start

Counting and Cardinality

Why: Students need to be able to count objects and understand that the last number counted represents the total quantity.

Introduction to Addition and Subtraction

Why: Students should have a basic understanding of what addition and subtraction mean conceptually before identifying information to solve these problems.

Key Vocabulary

Key Information	The essential numbers, words, or phrases in a word problem that are necessary to find the answer.
Irrelevant Information	Numbers, words, or phrases in a word problem that are not needed to solve it and can be ignored.
Word Problem	A mathematical problem presented in a story format that requires students to read, understand, and apply mathematical operations.
Operation Words	Words in a word problem that suggest which mathematical operation (like add, subtract, more, less) to use.

Watch Out for These Misconceptions

Common Misconception

Every number mentioned must be used in the calculation.

What to Teach Instead

Young students often add or subtract all numbers they see, leading to wrong answers. Pair talks help them justify choices based on the question. Sorting physical cards reinforces selecting only relevant quantities through hands-on trial.

Common Misconception

Descriptive words like colours or names are always important.

What to Teach Instead

Children fixate on details like 'red apples' instead of the quantity. Group discussions expose this as they vote on relevance. Active underlining activities build the habit of linking words directly to the operation needed.

Common Misconception

All words in the problem are equally useful.

What to Teach Instead

Students treat every phrase as vital, slowing their process. Collaborative highlighting reveals patterns in key action words. Movement-based relays make discarding extras fun and memorable.

Active Learning Ideas

Pairs: Highlight Hunt

Provide pairs with printed word problems and colored highlighters. One student reads aloud while the other highlights key numbers and words; they switch roles and compare. Pairs share one example with the class.

20 min·Pairs

Small Groups: Info Sort Relay

Cut problems into cards with numbers, words, and distractors. Groups line up and race to sort cards into 'key' or 'irrelevant' piles at a station, then solve the problem. Rotate roles for fairness.

30 min·Small Groups

Whole Class: Detective Vote

Display a word problem on the board. Teacher points to elements one by one; students vote with thumbs up for key info or down for irrelevant. Tally votes and discuss as a group before solving.

25 min·Whole Class

Individual: Circle and Check

Students receive worksheets with three problems. They circle key information independently, solve, then check against a partner. Teacher circulates to prompt reasoning.

15 min·Individual

Real-World Connections

• Grocery store cashiers must identify the prices of items and the amount paid to calculate the correct change, ignoring details like the brand of cereal or the color of the shopping cart.
• Construction workers reading blueprints need to focus on measurements and material specifications, disregarding decorative elements or landscaping plans to ensure accurate building.

Assessment Ideas

Quick Check

Present students with a word problem. Ask them to underline the numbers and words they think are important for solving it. Review their responses to see if they are focusing on the correct information.

Exit Ticket

Give each student a word problem. Ask them to write down the key numbers and words needed to solve it. Then, have them write one sentence explaining why one specific piece of information in the problem was not needed.

Discussion Prompt

Pose a word problem to the class. Ask: 'Which numbers do we need to use to find the answer?' and 'Are there any words here that don't help us solve the math part?' Facilitate a brief class discussion to hear their reasoning.

Frequently Asked Questions

How do I teach Year 1 students to identify key information in word problems?

Start with simple problems using familiar contexts like snacks or toys. Model by reading aloud and circling key parts on a shared chart. Guide practice with scaffolds like colour-coding numbers (blue) and actions (green). Gradually release to independent work, reviewing choices daily to build fluency. This progression aligns with AC9M1A02 and boosts confidence.

What are common errors when extracting key info in Year 1 math?

Students often use every number or fixate on descriptive details, ignoring the core question. They may overlook action words like 'share' that signal operations. Address through explicit modelling and peer checks. Regular exposure to varied problems helps discriminate essentials from distractors over time.

What activities work best for practising key information skills?

Try pair highlighting, group sorting relays, or whole-class voting games. These keep engagement high while practising selection. Follow with solving to connect identification to outcomes. Adapt problems to student interests, like animals or sports, for relevance. Track progress with quick journals.

How can active learning help students master identifying key information?

Active methods like physically sorting cards or highlighting in pairs make abstract selection concrete. Movement in relays builds quick decisions, while discussions clarify reasoning. Students retain more through doing, not just listening. These approaches reduce frustration, show immediate feedback, and fit Year 1 attention spans, leading to confident problem solvers.