Learning Resources Ler 2094 manual A R N I N G C L O C K, Extensions

EXTENSIONS

1.Elapsed Time. To help children gain a sense for the passing time, elapsed time can be experienced through hands-on activities. For example: How long is math class? How long do you sleep? Ask students to set the clock to the beginning time of math class, then turn the minute hand until the proper end time is reached. Then have students crank out ten hours (a typical sleep period for children) on the clock. Which is longer? How much more?

2.Adding Elapsed Time. Explore elapsed time using the Big Time™ Learning Clock™. First, have students set the clock to a time value that you have written on the board. Give students an elapsed period of time, such as three hours, and have them add the time onto the clocks. Start simple, and build to more challenging problems.

3.Subtracting Elapsed Time. Work “backward”with elapsed time. Have students set the clock to the time value you have shown on the board. Tell students that this is an end time, and a certain amount of time has elapsed. For example, show children the time 4:00. Tell them 2 hours have elapsed before this time. What was the starting time? Students turn the clock hands backward to come up with the answers.

4.Setting a Schedule. Have students replicate the daily class schedule

on paper, then follow along with the clock. How long does each subject last? How long is the school day? Ask students to write12out a typical1 schedule for their entire day. For each activity, have them calculate the elapsed time using starting and ending 1clock1times. Have students compare the times spent on shared activities.

5.The Second Hand. Explore the second hand using a classroom clock.

Ask students, “Each time the second0hand goes around once, how far does the minute hand move? How1many seconds are there in a minute?”

6.AM and PM. The hour hand of a clock rotates twice each day. To

keep the morning hours separate from the evening hours, people use the terms AM and PM; AM is used9to describe the morning hours and PM is used to describe the afternoon hours. Ask students how many hours there are in a day.

ALSO AVAILABLE FROM LEARNING RESOURCES®:

LER 0505 Digital Learning Clock®

LER 0576 Overhead Analog/Digital Clock

LER 2257 Tabletop Time Center

LER 2998 Talking Clever Clock™

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