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Q&A #212

Teachers' Lounge Discussion: Teaching elapsed time

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From: Kenya <willikm1@bay.k12.fl.us>
To: Teacher2Teacher Public Discussion
Date: 2008011521:39:17
Subject: Re: Re: Teaching elapsed time



1. Jamie put a pizza in the oven at 1:25. It cooked for 30 minutes.
What time was it when the pizza was ready to eat?

The student draws a t-chart. At the top on the left side write the
start time-1:25. On the top at the other side write min. Now, in
between the two draw an arrow pointing up to show that we are counting
up. Next, make several horizontal lines going down the t-chart. Under
"min." write 5, 10, 15, 20, 25, 30. On the other side, under 1:25,
count up the time until it is on the same line as "30." The left side
should say 1:30, 1:35, 1:40, 1:45, 1:50, 1:55. The answer is 1:55 and
I have the kids circle it.

This will work with virtually any kind of elapsed time problem.  i
found this on the internet.

2. Kyle's soccer practice started at 4:10 and lasted until 4:40. How
long did soccer practice last?

The student draws a t-chart. At the top on the left side write the
start time-4:10. On the top at the other side write min. Now, in
between the two draw an arrow pointing up to show that we are counting
up. Next, make several horizontal lines going down the t-chart. Under
the start time count up at five minute intervals until it shows 4:40.
Under min. count up by fives until you are on the same line as 4:40
and there you have how much time has passed! (30 min.)

3. Tamia went to the mall at 2:20 and shopped for one hour and 10
minutes. What time was it when Tamia left the mall?

This time you will complete two t-charts, one for the hours and the
other for minutes. Do the hour chart first. The student draws a
t-chart. On top of the left side write 2:20. On the top of the right
side write hours. Don't forget the arrow pointing up! Now make several
horizontal lines and label the first underneath hours with 1. Now move
2:20 to 3:20. The next thing to do is create the minutes t-chart and
use 3:20 as the start time.

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