Elapsed time is the time between a starting and ending time.

When adding or subtracting time, you must always be careful to count only 60 minutes in each
hour. You must also be careful with a.m. and p.m. times and switching between the two.

Objectives

Let the students know what they will be doing and learning today. Say something like this:

Today, class, we are going to learn how to calculate an ending time.

We are going to use the computers to do this, but please do not turn your computers on until I
ask you to. I want to show you a little about this activity first.

Teacher Input

Lead the students in a
discussion about how to calculate ending time.

Guided Practice

Have the students draw starting times and elapsed times on their
Elapsed Time Two Record Sheet. Then instruct them to calculate the elapsed time.

Open your browser to the
Elapsed Time Two applet. Explain to the students how to work the applet.