Mathematics · Foundation

Active learning ideas

Comparing Height: Taller and Shorter

Active learning turns abstract height comparisons into concrete, memorable experiences. When students move their bodies or handle objects, they internalize comparative language like taller and shorter in ways paper tasks cannot match. These activities also build spatial reasoning and vocabulary together, which supports later measurement work.

• ACARA Content Descriptions
• AC9M7M01

• 15–30 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Experiential Learning
• 20 min · Pairs

Partner Check: Back-to-Back Heights

Pairs stand back-to-back with hands on heads. One observes the top hand position and declares who is taller. Partners switch roles, then share how they decided with the class.

Who is taller , you or your partner? How can we check?

Facilitation Tip

During Partner Check: Back-to-Back Heights, circulate and listen for students to name the taller person first before moving on.

What to look for

Present students with two classroom objects, such as a book and a pencil. Ask: 'Which object is taller? Which object is shorter? How do you know?' Observe their responses and justifications.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

Activity 02

• Experiential Learning
• 30 min · Individual

Object Hunt: Taller Than Me

Each student finds three classroom objects taller than themselves and three shorter. They draw or label them on a chart. Students present one example to the group, explaining their choice.

Can you find something in the room that is taller than you?

Facilitation Tip

During Object Hunt: Taller Than Me, prompt students to place found objects in a single line so everyone can see the order.

What to look for

Give each student a card with a drawing of three objects of different heights. Ask them to draw an arrow pointing from the tallest object to the shortest object and write one word describing the tallest object.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

Activity 03

• Experiential Learning
• 25 min · Small Groups

Ordering Relay: Tall to Short

In small groups, provide five objects of varying heights. Groups line them up tallest to shortest, justifying each placement. Rotate roles so all contribute.

Can you put these three classroom objects in order from tallest to shortest?

Facilitation Tip

During Ordering Relay: Tall to Short, give each team a colored strip to mark each object’s position so the sequence is visible throughout the task.

What to look for

Ask students to stand back-to-back with a partner. Prompt: 'Is one of you taller than the other? How can you tell? Now, can you find something in the classroom that is taller than both of you?' Facilitate a brief class discussion about their findings.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

Activity 04

• Experiential Learning
• 15 min · Whole Class

Class Line-Up: Human Heights

Whole class stands and attempts to line up from tallest to shortest. Adjust positions through discussion. Measure final order with a string or tape for verification.

Who is taller , you or your partner? How can we check?

Facilitation Tip

During Class Line-Up: Human Heights, stand at the end of the line to help students confirm the order by pointing and naming each classmate.

What to look for

Present students with two classroom objects, such as a book and a pencil. Ask: 'Which object is taller? Which object is shorter? How do you know?' Observe their responses and justifications.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

A few notes on teaching this unit

Teachers should model clear language during comparisons, using full sentences like 'This pencil is shorter than the book.' Avoid mixing height with width in early tasks; keep objects thin and upright to isolate the height attribute. Research shows that children learn comparative terms best when they pair verbal reasoning with physical actions, so pair talk with movement whenever possible.

By the end of these activities, students will confidently use taller and shorter to compare two items, order three or more items correctly, and explain their reasoning using clear language. They will also notice that height is separate from width or weight, and that ordering remains stable when viewed from different angles.

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Watch Out for These Misconceptions

• During Partner Check: Back-to-Back Heights, watch for students who assume the wider student is taller.

  Have the pair switch places and repeat the comparison, then ask each student to trace their height on a strip of paper and compare the strips side-by-side.

• During Object Hunt: Taller Than Me, watch for students who order objects by overall size rather than height alone.

  Provide thin, upright objects like wooden blocks or markers and ask students to line them up so they stand straight, then reorder if needed.

• During Ordering Relay: Tall to Short, watch for students who think ordering changes when they move around the objects.

  Ask students to rotate around their line of objects, naming each object’s position each time to confirm the order stays the same.

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Methods used in this brief

• Experiential Learning