A 60 minute lesson in which students will understand the relationship between 12- and 24-hour time systems.
In small groups, encourage the students to brainstorm where they have seen 24-hour time used in society. Allow the students to share their ideas with the class and record these as a mind map on the board.
Watch the video Late again! on the ABC Splash website. After watching, ask the students:
Why is the 24-hour clock a useful way of telling the time?
What is the relationship between am and pm notation and the 24-hour clock?
What methods might you use to convert between the two?
Provide the students with a laminated copy of the 12 and 24 Hour Clock Template, a whiteboard marker and cloth. Call out a variety of times (am, pm and 24-hour) for the students to draw and display on their clocks. Students could work individually or in pairs for this task.
Explain to the students how to play the 24-Hour Time Memory Game. Students choose one green card and one yellow card. If the 12-hour time matches the 24-hour time, the student keeps the matching pair. Monitor and support the students as they complete the activity.
To review the content of the lesson, ask the students to explain the relationship between am and pm notation and the 24-hour clock, and the methods used to convert between the two.
Encourage more capable students to make up their own games using the cards from the 24-Hour Time Memory Game, such as 'Snap' or 'Go Fish'.