Tell Time and Elapsed Time

Overview

In this six-student? class of 8 fourth graders, students build on prior work with clocks and measurement units to read analog and digital times and determine elapsed time. Students use five-minute intervals, a number-line timeline, and everyday schedules to explain how long activities last.

Learning intentions

Students will be able to:

• Read and write times shown on analog and digital clocks.
• Identify the hour and minute hands and count minutes in five-minute intervals.
• Find elapsed time between a start time and an end time.
• Use a timeline to explain an elapsed-time solution.

Success criteria

• I can read the hour and minutes on an analog clock.
• I can use a timeline to find elapsed time.
• I can identify the start and end of an activity.
• I can explain how long an everyday activity lasts.

Curriculum links

• Measurement and Data — know relative sizes and relationships among hours and minutes.
• Measurement and Data — use the four operations and number-line diagrams to solve time word problems.
• Number and Operations in Base Ten — read, write, and compare whole-number measurements and times.
• Georgia Standards of Excellence/Common Core-aligned competencies — model, represent, solve, and explain mathematical reasoning.

Lesson structure (30 minutes)

1. 0–3 min · Hook and review. Open with the opening time mystery slide showing an analog clock and the question, “Would you have enough time to finish breakfast before the bus?” Students identify the hour hand, minute hand, and what information they would need to know. Briefly review the vocabulary: hour, minute, a.m., p.m., elapsed time, start, and end.

2. 3–10 min · I do: model clock reading. Use the clock-reading modeling slides and a large teaching clock to model moving the hands in five-minute steps; emphasize that the short hand shows hours, the long hand shows minutes, and the minute hand pointing to 12 means:00. Students echo-read sample times, first choosing between analog and digital displays if needed, then explain how the minute hand helps them read the minutes.

3. 10–17 min · I do: model elapsed time. Display a number-line timeline using the elapsed-time modeling slides. Model a problem such as, “Recess starts at 10:00 and ends at 10:30. How long is recess?” Mark the start and end, make jumps of 5 or 10 minutes, and connect the jumps to addition. Students help place the times and state the elapsed time. Repeat with a whole-hour example, such as 8:00 to 2:00, noting that the time passes across several hours.

4. 17–23 min · We do: interactive practice. Open the interactive clock and timeline activity slides. One student at a time moves clock hands on the smartboard while classmates use hand signals or mini clocks to show agreement. Pairs then identify the start and end times in two classroom-schedule examples and describe the timeline jumps aloud. Prompt students with: “What is the start time?” “What is the end time?” and “How many minutes or hours are between them?”

5. 23–28 min · You do: independent check. Distribute the tell-time and elapsed-time practice sheet. Students read three clocks and solve one elapsed-time problem independently. Encourage students to draw a timeline or use a five-minute counting strip. Circulate and ask selected students to explain whether they counted minutes, hours, or both. Students may answer using either analog or digital representations when the worksheet allows.

6. 28–30 min · Exit assessment and close. Display the review and exit-question slides and read each question aloud. Students answer the five multiple-choice questions on the worksheet: the short hand shows hours; 3:00 plus 1 hour is 4:00; 10:00 to 10:30 is 30 minutes; 8:00 to 2:00 is 6 hours; and the long hand on 12 means:00. Students hold up or circle answers, then share one strategy they used.

Resources

• the complete time and elapsed-time slide deck
• the tell-time and elapsed-time practice sheet
• Large teaching clock with movable hands
• Smartboard or interactive display
• Student mini clocks or clock-face templates
• Five-minute counting strips
• Colored pencils or highlighters
• Sample classroom schedule showing a.m. and p.m. times

Assessment

• During modeling, check whether students correctly identify the short hand, long hand, hour, and minutes. Ask students to justify answers rather than relying only on recognition.
• During partner practice, listen for accurate use of start, end, and elapsed time and observe whether students place times correctly on the timeline.
• Use the five-question worksheet exit check to identify misconceptions. Reteach students who confuse the clock hands, read:30 as:15, or count elapsed hours inaccurately.

Differentiation

• Provide a large teaching clock, color-coded hands, a five-minute counting strip, and a partially completed timeline. Keep the hour hand one color and the minute hand another throughout the lesson.
• Read all directions and word problems aloud. Use short sentences, generous spacing, large clock faces, and uncluttered visual layouts for students with dyslexia.
• Offer analog and digital choices, allow students to point, circle, or explain orally, and pair students strategically for discussion. Preteach and display the vocabulary with simple visual examples.
• Support students who need additional structure by giving start and end labels before they begin. Challenge ready students to create a classroom-schedule problem involving both hours and minutes and solve it with a labeled timeline.