IGCSE / O LEVELS MATH LESSON PLAN 1.15 – Time

Lesson 1: Calculations with Time Units

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ObjectiveCalculate with time: seconds, minutes, hours, days, weeks, months, years, including relationships between units.
Activities– Starter (5 mins): Ask: “How many minutes are there in 2 hours 15 minutes?” – Main (30 mins): Teach unit conversions (1 min = 60 s, 1 h = 60 min, 1 day = 24 h, 1 year = 365 days). Practice problems converting between units. – Plenary (5 mins): Quick quiz converting times between units.
ResourcesWorksheets, conversion tables, stopwatch or clock images.
Time40 minutes: 5 (Starter) + 30 (Main) + 5 (Plenary).
HomeworkConvert 15 different time values into other units (hours → minutes, days → hours, etc.).
AssessmentWorksheet: time conversions.
Past Paper Practice“Convert 2 hours 45 minutes into minutes.”

Lesson 2: 12-hour and 24-hour Clock

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ObjectiveCalculate and interpret times using 12-hour and 24-hour clock systems.
Activities– Starter (5 mins): Show 1515 → ask students to write in 12-hour clock. – Main (30 mins): Teach conversions between 12-hour and 24-hour clock. Practice reading timetables and travel schedules. – Plenary (5 mins): Quick-fire conversion exercise.
ResourcesWorksheets, sample timetables, clock diagrams.
Time40 minutes: 5 (Starter) + 30 (Main) + 5 (Plenary).
HomeworkWrite 10 random times in both 12-hour and 24-hour format.
AssessmentWorksheet: interpreting and converting clock times.
Past Paper Practice“In the 24-hour clock, 3.15 p.m. is written as 1515.”

Lesson 3: Time Zones and Timetables

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ObjectiveSolve problems involving timetables, time zones, local times, and time differences.
Activities– Starter (5 mins): Ask: “If it’s 9:00 a.m. in London, what time is it in Karachi (UTC+5)?” – Main (30 mins): Teach calculating differences between local times and solving timetable problems (flights, trains). Practice real-life examples with world map. – Plenary (5 mins): Group activity: plan a flight schedule across 3 time zones.
ResourcesWorksheets, world time zone map, airline/train timetables.
Time40 minutes: 5 (Starter) + 30 (Main) + 5 (Plenary).
HomeworkSolve 5 travel timetable problems involving time zones.
AssessmentWorksheet: problems on time zones and schedules.
Past Paper Practice“Solve timetable problem involving time differences.”
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