Warm Up: Do you see any pattern Can you create an X puzzle Use the X Puzzle handout to complete Xs p

1
Warm Up Do you see any pattern? Can you create
an X puzzle?Use the X Puzzle handout to
complete Xs puzzles you create. You can use the
index cards and markers to make some for your
students.
12
45
3
4
5
9
7
14
2
Solving the Elapsed Time Nightmare

• December 9, 2008

3
Solving time problems in the real world.How much
time did I spend?
4
4th/5th Grade TEKS

• (4.12) The student applies measurement concepts.
  The student measures time and temperature (in
  degrees Fahrenheit and Celsius).
• (B) Use tools such as a clock with gears or a
  stopwatch to solve problems involving elapsed
  time.
• (5.11) The student applies measurement concepts.
  The student measures time and temperature (in
  degrees Fahrenheit and Celsius).
• (B) Solves problems involving elapsed time.

4th Bundle 8 5th Bundle 9
5
What is Elapsed Time?

• The difference between 2 set times. We will look
  at examples and strategies for each. TAKS has all
  3 and the students have to be able to know the
  different approaches.
• Begin/End Find the Elapsed Time
• Begin/Elapsed Find the End Time
• Elapsed/End Find the Begin Time

6
A quick look at each kind of Elapsed Time
problems the students may see on TAKS.
7
Beginning and Ending Time
?
710 1055
8
Beginning and Elapsed Time
Natalie and Maria left the school at 305 pm.
They walked for 14 minutes before arriving at
Marias house. What time did they arrive at
Marias house?
?
305
14 mins.
9
Elapsed Time and Ending Time
The Garzas will visit their cousin, who lives 3
hours and 10 minutes away. They want to get
there at 1130 am. What time should they leave?
?
1130
3 hrs 10 min.
10
How will the students decide?
So much to process on a difficult concept. How
can we help our students?
11
Strategy How would you solve?

• Cesar and Luis went to see the newest talking dog
  movie. The movie started at 1215 PM and ended at
  205 PM. How long did the movie last?
• Elapsed Time 1 hour 50 minutes
• Carey and Tina skateboarded for 1 hour and 35
  minutes. They left Carries house at 1050 AM.
  What time did they return?
• End 1225 AM
• Soccer practice lasted 2 hours and 17 minutes. If
  practice was over at 810 PM, what time did it
  start?
• Begin 553 PM

12
Number Line Strategy!

• Start with a whole number, number line
• Discuss the difference between a closed number
  line/open number line
• Show Midnight and Noon as 1200, but at different
  perspectives
• Allow students to develop the different time
  increments that make sense
• 30 minutes
• 15 minutes
• 10 minutes
• 5 minutes
• 1 minute
• Work toward building a diagram with number line
  as a graphic organizer

13
Strategy 1 Use a Number Line

• Cesar and Luis went to see the newest talking dog
  movie. The movie started at 1215 PM and ended at
  205 PM. How long did the movie last?
• Elapsed Time 1 hour 50 minutes

1215 PM
115 PM
215 PM
1 hour 50 min
14
Another Look! Another way!
Help your students find the Best way for them.
Let them experiment and inquire.

• Cesar and Luis went to see the newest talking dog
  movie. The movie started at 1215 PM and ended at
  205 PM. How long did the movie last?
• Elapsed Time 1 hour 50 minutes

1 hour 45 mins 5 mins 1 hr 50 mins
15
Elapsed Time Strings 1-Begin Time End Time
(Find Elapsed Time)
16
Strategy 2 Use a Number Line

• Carey and Tina skateboarded for 1 hour and 35
  minutes. They left Carries house at 950 AM.
  What time did they return?
• End 1125 AM

950 AM
17
Another Look! Another way!

• Carey and Tina skateboarded for 1 hour and 35
  minutes. They left Carries house at 950 AM.
  What time did they return?
• End 1125 AM

1125 is when they returned.
950 AM
18
Elapsed Time Strings 2-Begin Time Elapsed
Time (Find End Time)
19
Strategy 3 Use a Number Line

• Soccer practice lasted 2 hours and 17 minutes. If
  practice was over at 810 PM, what time did it
  start?
• Begin 553 PM

810 PM
20
Another Look! Another way!

• Soccer practice lasted 2 hours and 17 minutes. If
  practice was over at 810 PM, what time did it
  start?
• Begin 553 PM

810 PM
21
Elapsed Time Strings 3-Elapsed Time End Time
(Find Beginning Time)
22
What does all this mean? Develop strategies for
the students.

• Elapsed Time Graphic Organizer

23
Elapsed Time Ruler

• Lets create one and find out how to use it.

24
Other Resources

• Web Sites on
• Math Home Page
• 4th Grade
  5th Grade
• AIRR 162
  AIRR 153
• AIRR 163
  AIRR 154
• 
  AIRR 155
• Kamico Kamico-
• Tug-of- War
  All in Good Time
• Page 415
  Page 271

Complete the evaluation. Drop off at the
table. Pick up a clean packet for your use.