Math Focus 3

## CHAPTER 10: MEASUREMENT: TIME AND MASS

### Lesson 2: Using Seconds, Minutes, and Hours

Goal

Measure, estimate, and compare lengths of time using seconds, minutes, and hours.

Builds Upon

Student Book pages 230–231

Instructions for Use

Stopwatch allows your child to use a timer to measure lengths of time, either counting up from 0:00, or down from another given time.

To count up from 0:00, click “Start” below the time. Click “Stop” when the timing is complete, and “Reset” to start the clock again at 0:00.

To count down from another time, enter the time in white boxes at the top of the page, then click “Set Time.” The first box is for the hour, the second box is for the minutes, and the third box is for the seconds. Click the down arrow to the right of the large time to count down. Last, click “Start” to start the clock.

Analog and Digital Clocks allows your child to use an analog clock to measure lengths of time.

Click “Start” at the bottom. Then click “Now” at the bottom left corner to start the clock at the current time. The clock will show the time as it passes. When you wish to stop the time, click the square below the clock.