My Day: Measuring Time Durations
Year 4 Mathematics Learning to calculate how long activities take Using am and pm notation
What is Duration?
Duration is how long something takes We measure from start time to end time Like timing how long you brush your teeth Or how long recess lasts at school
AM and PM - Morning and Afternoon
AM = morning (before 12:00 noon) PM = afternoon and evening (after 12:00 noon) 7:30 am = breakfast time 3:30 pm = home from school time
Let's Calculate Together!
Activity: Eating Breakfast Start Time: 7:00 am End Time: 7:30 am How long did breakfast take?
More Duration Examples
{"left":"School starts: 9:00 am\nSchool ends: 3:15 pm\nDuration: 6 hours 15 minutes","right":"Lunch break: 12:30 pm\nLunch ends: 1:15 pm\nDuration: 45 minutes"}
Think About Your Day
{"left":"School starts: 9:00 am\nSchool ends: 3:15 pm\nDuration: 6 hours 15 minutes","right":""}
Create Your Daily Schedule
List 4-5 daily activities Write start and end times using am/pm Calculate duration for each activity Use hours and minutes (60 minutes = 1 hour)
What We Learned Today
Duration measures how long activities take We use am and pm to show morning and afternoon We calculate duration by subtracting start from end time Time measurement helps us plan our days