Foundations of Mathematical Thinking · Senior Infants · Long and Short , Measuring Length · Spring Term

Learning About Time

Working with the 24-hour clock, calculating durations, and understanding basic time zone differences.

• NCCA Curriculum Specifications
• NCCA: Junior Cycle - Measurement - M.5

About This Topic

Learning About Time introduces Senior Infants to the 24-hour clock, calculating simple durations, and basic time zone differences. Students read times like 09:00 for school start or 15:30 for home time, measure how long activities last using timers, and compare Ireland's time to places like New York, which is five hours behind. These skills link to daily routines, such as morning preparations before school or sequencing events from Monday to Sunday.

This topic fits within the NCCA Foundations of Mathematical Thinking, supporting measurement strand M.5 by developing temporal awareness alongside length and other measures. Children practice ordering days of the week, identifying clock positions like the big hand on 12 for o'clock times, and estimating durations for play or tidy-up. It fosters sequencing and problem-solving, essential for later mathematics.

Active learning suits this topic well. Children manipulate model clocks, time classroom events with sand timers, or role-play global schedules on maps. These methods make abstract time concepts concrete, encourage peer talk during group timing challenges, and build confidence through repeated, playful practice.

Key Questions

1. What do you do in the morning before you come to school?
2. Can you point to the clock when the big hand is on the 12?
3. What day comes after Monday?

Learning Objectives

• Identify and state the time shown on a 24-hour digital clock to the nearest hour and half-hour.
• Calculate the duration of simple activities, such as a 15-minute playtime or a 30-minute lesson.
• Compare the time in Ireland to the time in a different time zone, such as New York, identifying the difference in hours.
• Sequence daily events, such as breakfast, school, and bedtime, in chronological order using days of the week.

Before You Start

Number Recognition and Counting (0-20)

Why: Students need to be able to recognize and count numbers to understand hours and minutes on a clock.

Sequencing of Events

Why: Understanding the order of daily activities is a foundation for understanding the sequence of time throughout the day and week.

Key Vocabulary

24-hour clock	A clock that counts the hours from 00 to 23, used to avoid confusion between morning and afternoon times. For example, 3 PM is 15:00.
duration	The length of time that something continues or lasts. We can measure duration with a timer or by counting minutes.
time zone	A region of the world that observes a uniform standard time for legal, commercial, and social purposes. Different places have different times at the same moment.
o'clock	Used to indicate the hour when the minute hand of a clock is pointing to the 12. For example, 9:00 is 9 o'clock.

Watch Out for These Misconceptions

Common Misconception

The clock hands move backwards.

What to Teach Instead

Children often reverse hour and minute hands due to unfamiliarity. Hands-on clock models let them physically move hands forward, observing minute hand full circles for hours. Pair discussions during reading practice clarify direction and build accuracy.

Common Misconception

Time zones mean clocks run at different speeds.

What to Teach Instead

Students may think distant places have faster or slower time. Simple map activities with synced clocks show fixed offsets, like five hours behind. Group role-plays of international calls reveal simultaneous events, correcting through shared exploration.

Common Misconception

Days of the week repeat randomly.

What to Teach Instead

Some believe Tuesday follows Saturday. Timeline walks and songs in small groups reinforce sequence. Manipulating day cards in order helps visualize patterns, with peer teaching solidifying weekly cycles.

Active Learning Ideas

Hands-On Clock: Build and Read

Provide paper plates, brads, and markers for students to create analog clocks. Demonstrate setting hands for school times like 09:00, then have pairs set and read five daily times while linking to routines. Discuss as a class.

30 min·Pairs

Duration Hunt: Timer Challenges

Give small groups stopwatches or sand timers. Assign tasks like clapping for 10 seconds or walking laps, record durations on charts. Compare results and add up total times for morning activities.

35 min·Small Groups

Days of Week: Timeline Parade

Create a class timeline on the floor with day cards. Students in small groups act out Monday events, then Tuesday, moving along the line. Point to clocks for key times each day.

40 min·Small Groups

Time Zones Map: Global Clock Sync

Display a world map with clocks for Ireland and two other places. Whole class sets times, like bedtime here versus morning there. Pairs draw family routines adjusted for zones.

25 min·Whole Class

Real-World Connections

• Airline pilots and air traffic controllers use the 24-hour clock to schedule flights and manage air traffic, ensuring safety and efficiency across international routes.
• News reporters and international business people need to understand time zones to coordinate live broadcasts or calls with colleagues in different countries, like coordinating a video conference between Dublin and Tokyo.
• Parents use time to plan daily routines for children, scheduling meals, naps, and bedtime to ensure a consistent and predictable day.

Assessment Ideas

Quick Check

Present students with a digital clock showing times like 08:00, 10:30, and 14:00. Ask them to say the time aloud and identify if it is morning or afternoon. Then, ask: 'How many hours until lunchtime at 12:00?'

Discussion Prompt

Show a world map with different time zones marked. Ask students: 'If it is 10:00 AM in Ireland, what time might it be in Australia? Is it earlier or later?' Encourage them to explain their reasoning based on the map.

Exit Ticket

Give each student a card with a picture of a common activity (e.g., eating breakfast, playing outside, going to bed). Ask them to write the approximate time they do this activity using the 24-hour clock and the day of the week it usually happens.

Frequently Asked Questions

How do you introduce the 24-hour clock to Senior Infants?

Start with familiar times like 09:00 for school using large model clocks and daily visuals. Practice reading digital displays on classroom timers alongside analog hands. Link to routines through chants and pictures, gradually adding durations like recess length for reinforcement.

What activities help calculate durations?

Use sand timers for short events like hand washing, recording seconds on group charts. Progress to stopwatches for playground laps, comparing estimates to actuals. These build number sense and estimation, connecting time to movement.

How can active learning help students understand time concepts?

Active methods like manipulating clock hands, timing peer games, and walking day timelines engage multiple senses. Small group challenges encourage talk and error correction, while role-plays make time zones relatable. This play-based approach turns abstract ideas into memorable experiences, boosting retention and enthusiasm.

How to address basic time zone differences?

Use a world map with adjustable clocks for Ireland, London, and New York. Demonstrate offsets by setting current time here and adjusting others. Children draw clocks for family abroad, discussing when to call, making global connections personal and clear.