Tell time to the whole and half hours - minute hand introduced

In this lesson, children learn why times such as "half past 5" can also be stated as 5:30 -- using hours AND minutes.
In the previous lesson on telling time, we only used the hour hand. Now we introduce the minute hand. I show how the minute hand travels one full round (60 minutes) while the hour hand goes from one hour to the next, such as from 4 to 5 on the clock face. This full round is 60 minutes, and so half an hour is 30 minutes. That is why, for example, half past 4 is also 4 hours 30 minutes.
We practice telling time (whole hours and half hours) in these two ways: either using the "o'clock" / "half past", or stating the hours and minutes. We also figure out what time it will be half an hour later.
This lesson is meant for 1st grade math.
Check out also my workbook on telling time and reading the clock at www.mathmammoth...