FOCUS QUESTION
How do I use the various measurements around me?
There are 24 hrs. in
one day. The 24-hr is divided into two parts of 12 hrs. each. In the 24-hr clock
system, time is written as the number of hours that have passed since midnight.
In this system, the day is divided into 2 parts of 12 hours each. In this
system time is written in 4 digits. The first 2 digits on the left are for the
hours and the next two for the minutes.
In the 24-hr system,
time starts at 12 hrs. midnight, that is, 00:00 hrs. The next hour after is
01:00. If the first 2 digits to the left are less than 12, the time shows the
morning hours or a.m.. If it's more than 12, then it shows afternoon or p.m.
Students will watch youtube video (Telling Time for Children) , to review the 12 hr clock and its use in telling the time. They will discuss other ways of writing time example quarter to ten would be 9:45.
Engage in discussion on what they know about the 24 hour clock.
Watch Youtube video (Reading Time In Different Clock System) to glean information on the 24-hr clock. They will identify situations when this feature is used in society. ( Navy/Military, hospital, airports, by scientists)
Students will play a fishing game where they take up a “fish” without looking. They will walk around and search for their “partner fish” which is telling the same time as the "fish" they have.
Explain what the 24 hour clock is and compare it with the 12-hr clock. Use the 24 hr clock to show when the different activities below are done.
Complete the chart below.
Develop rules for converting p.m time to 24-hr clock.
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