Duration of Events

Active learning helps Senior Infant students grasp duration by turning abstract time into tangible experiences they can see and feel. When children time real tasks like coat putting or playtime segments, they connect words like longer and shorter to their own actions, making measurement meaningful straight away.

• Senior Infants
• Foundations of Mathematical Thinking
• 4 activities
• 15 min–30 min

Learning Objectives

1. Compare the duration of two familiar activities using comparative language like longer and shorter.
2. Estimate the time needed for a simple task and then verify the estimate using a timer.
3. Order three classroom activities from shortest duration to longest duration.
4. Explain why a particular activity felt longer or shorter than another, referencing personal perception.
5. Identify which of two given circular objects takes longer to complete one rotation.

Experiential Learning

⏱ 20 min·Pairs

Partner Challenge: Coat vs Shoelace

Pairs use a one-minute sand timer to time each other putting on a coat, then tying shoelaces. They record results on a simple chart and discuss which took longer. Switch roles and compare personal times.

Prepare & details

Which takes longer — putting on your coat or tying your shoelace?

Facilitation Tip: During Partner Challenge, hand out stopwatches and clearly model how to start and stop them to avoid confusion.

Setup: Varies; may include outdoor space, lab, or community setting

Materials: Experience setup materials, Reflection journal with prompts, Observation worksheet, Connection-to-content framework

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

Experiential Learning

⏱ 30 min·Small Groups

Routine Relay: Classroom Timers

Small groups rotate through three stations: timing line-up, hand-washing, and story circle starts. Use egg timers and tally marks to note durations. Groups share and vote on the longest routine.

Prepare & details

Does playtime feel long or short — why do you think that?

Facilitation Tip: For Routine Relay, assign roles so every student has a timer and a clipboard for recording results.

Setup: Varies; may include outdoor space, lab, or community setting

Materials: Experience setup materials, Reflection journal with prompts, Observation worksheet, Connection-to-content framework

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

Experiential Learning

⏱ 25 min·Whole Class

Estimate Circle: Playtime Segments

In a whole class circle, estimate time for short play bursts like jumping or ball rolling. Time each with claps, then check against estimates. Chart fun activities that felt shortest.

Prepare & details

Which classroom activity took the longest time today?

Facilitation Tip: In Estimate Circle, use a large sand timer so the whole class can see the sand level as they estimate.

Setup: Varies; may include outdoor space, lab, or community setting

Materials: Experience setup materials, Reflection journal with prompts, Observation worksheet, Connection-to-content framework

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

Experiential Learning

⏱ 15 min·Individual

Personal Timer: Morning Tasks

Individuals time their own bag-unpacking or seat-finding using phone timers or beats. Share estimates first, then actuals in pairs. Class graphs show variations.

Prepare & details

Which takes longer — putting on your coat or tying your shoelace?

Facilitation Tip: For Personal Timer, provide visual step-by-step cards to help students sequence morning tasks independently.

Setup: Varies; may include outdoor space, lab, or community setting

Materials: Experience setup materials, Reflection journal with prompts, Observation worksheet, Connection-to-content framework

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

Teaching This Topic

Teachers often begin with concrete tasks before moving to estimation to build trust in measurement tools. Avoid vague language like 'a long time'; instead, anchor comparisons in countable units such as claps, steps, or timer turns. Research shows young children grasp duration best when they both predict and verify, so balance these moments carefully.

What to Expect

By the end of these activities, students will confidently compare task lengths using precise vocabulary and estimate durations before verifying with timers. You should hear them justify choices with phrases like, 'Tying laces took 30 claps, so it’s longer than a quick high-five.'

Watch Out for These Misconceptions

Common Misconception

During Partner Challenge, watch for students who assume playtime activities will always take longer than routine tasks.

What to Teach Instead

Prompt pairs to time both putting on a coat and playing with a favorite toy, then ask them to compare the actual times on their charts to see if their feelings match the facts.

Common Misconception

During Routine Relay, watch for students who believe everyone takes the same time to complete classroom routines.

What to Teach Instead

Ask students to record each other’s times on a shared table, then have them circle the fastest and slowest times in a different color to highlight individual differences.

Common Misconception

During Estimate Circle, watch for students who insist playtime feels like the longest part of the day because it is the most enjoyable.

What to Teach Instead

Show the class the school timetable with fixed playtime and worktime lengths, then ask them to time both segments and mark the actual durations on a visual timeline to compare perceptions with reality.

Assessment Ideas

Quick Check

After the 10-second clap activity, ask students to stand up and clap for 10 seconds, then ask: 'Did that feel longer or shorter than tying your shoelaces during Partner Challenge? Hold up your hands to show how many times you clapped. Who thinks their claps lasted longer than their partner’s shoelace time?'

Exit Ticket

After Routine Relay, give each student a card with two activities from their morning, such as 'brushing teeth' and 'putting on your coat'. Ask them to circle the activity they think takes longer and write one word to explain their choice. Collect the cards to review their reasoning.

Discussion Prompt

During Estimate Circle, show students a sand timer and ask: 'If we spin around until the sand runs out, will that feel longer or shorter than your math lesson during Routine Relay? Why do you think so?' Facilitate a brief discussion where students compare their spinning time to their recorded math lesson time on their charts.

Extensions & Scaffolding

• Challenge students to time a new task like 'building a tower with 10 blocks' and predict how it compares to their coat time before testing.
• Scaffolding: Pair students who struggle with a peer timer buddy who models clear start and stop actions.
• Deeper exploration: Introduce a class graph where students add their coat-tying times with stickers, then discuss patterns in the data.

Key Vocabulary

duration	How long something takes from beginning to end. It tells us the length of time an event lasts.
estimate	To make a guess about how long something will take, based on what you already know or have experienced.
longer	Describes an event or activity that takes more time to complete than another.
shorter	Describes an event or activity that takes less time to complete than another.
fast	Moving or happening in a very short amount of time.
slow	Moving or happening at a reduced pace, taking more time.