24 Hour Time – Is It Confusing?

Day 311 - Take your Time

Christophe Verdier via Compfight

One of the Mathematics curriculum statements for Year Five is about comparing and understanding the differences between 12 hour and 24 hour time.

Curriculum statement

Mrs S found some research that had been conducted by McCrindle, a research company, where it stated 1 in 10 adults in Australia are confused by 24 hour time and cannot read it properly.

24 hour time, sometimes called military time, shows how many hours and minutes since midnight. 12 hour time splits the day into two sections. The first section runs from midnight to noon (the AM hours) and the second section runs from noon to midnight (the PM hours). The Math is Fun website has a great image comparing 12 hour and 24 hour times.

We may see 24 hour time on train, ferry or bus timetables and airlines use 24 hour time when listing flight departures and arrivals. It is used to avoid confusion about when an event is occurring as the numbers in a 24 hour period are all different when using 24 hour time.

If 12 hour time is used we see the same set of numbers used twice in a 24 hour period and need to see the AM or PM suffix to help us read the time correctly. The timeanddate website has some great information about AM and PM.

Mrs S found an online interactive that we can use to practise telling time and also to practise converting times between the 12 and 24 hour time systems. You might also like to have a go at Stop The Clock (12hr time) or Stop The Clock (24hr time) to brush up on your time telling skills.

Where have you used 24 hour time? When would it be better to use 24 hour time? Please leave a comment sharing your thoughts.

Looking at Floods

In Term 1 this year with Mrs S we are investigating floods. We listened to the story called Flood written by Jackie French and illustrated by Bruce Whatley. We also looked at some before and after images of the 2011 Queensland floods before having some time to write down questions, words and information the word floods brought to mind.

Here are some of the questions we came up with.

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We also listed words and Mrs S created a wordle to find the common words on our pages.

floods 1 wordle

We are now doing some research to find out more about floods and the impact they have on communities and the natural environment.

Do you have any good web links that you could share with us about floods. What questions do you think of when you hear the word flood? Please leave a comment sharing your thoughts.