Name the parts of a clock and read and tell time to the hour.
A clock has two hands: the SHORT hand points to the hour, and the LONG hand points to the minutes. When the long hand points straight up at the 12, and the short hand points right at a number, it is exactly that hour o'clock.
To read time to the hour, find the short hand first -- that number IS the hour. Then check that the long hand is on the 12.
Mastery looks like: They correctly read and set a clock to any exact hour, o'clock, time.
Common stumbles: Mixing up which hand is which; reading the number the long hand is near instead of checking that it is on the 12.