Date: 05/24/2013
Author: Viollca Sumbulla
Topic: Elapsed Time- One Hour
Goals and Assessments: 
•	Students will be able to understand the concept of elapsed time.
•	Students will be able to calculate elapsed time when the starting and ending time is given to them.
•	Connection of elapsed time concept with other content area, and understanding it in real life situations.
•	Use appropriate tools strategically such as number line, or T-charts.
Lesson Objectives: Common Core: Measurement and data
3. MD. Tell and write time
3. MD. Solve problems involving measurement and estimation of intervals of time.
Rationale: Students should have a sense of measuring intervals of time. Some students have difficulties solving elapsed time problems using clocks. Students will understand key math concepts for Elapsed Time such: beginning, ending, Elapsed time.
Anticipatory Set: Prior Knowledge: Can you tell me about sunrise and sunset chart? Can someone explain how does it work? How long was the sun out in a particular day?
The emphasis is at the beginning and ending time of an activity or event.
Procedure:
1. Prior Background: One reporter student will show the sunrise time for one particular day using the rainbow chart that class has been created. 
Example: I show 6:30 on the clock face. This is the time the sun rises. If sunset is at 7:40, how long is the sun out? How did you come up with that answer? We will point out the beginning and ending time. I guide students to find the elapse time by counting the hours first, and then the minutes. Ask students what time math class started? This fancy name for the time that passed is called Elapsed Time. HOT questions: Why should we know Elapsed time? (Class discussion)
2. Introduction: Next, we are going to watch a video for the elapsed time. Present video to reinforce concept presented. http://pinterest.com/pin/218213544417275341/     -5 min. This video shows how to use T-Charts in calculating elapsed time.
Additional video resources: http://www.youtube.com/watch?v=yy0NwS8abQAmin)-7min. This video shows how to use number line in calculating elapsed time. 
3. Guided practice: We learned how to find the elapsed time for one activity. In real life, we have situations when we need to figure out elapsed time for more than one activity. This is what we are going to do while we read the following story. In other words, how many minutes have gone by in all? Elapsed Time Story: "Get Up and Go" by Stewart Murphy (Teaching Elapsed concept with literature). Guide students to fill out time line activity worksheet. (Elmo, calculators) 
4. Assess students: How many minutes have gone by in all? Find a partner to check your answer. Use Elmo to show the correct answer, using the time line.
5. Centers: Give directions for all centers. Divide class in three centers. Switch centers (10 min each) Each student goes to all three centers.
Center 1 First Choice: I pad apps:” Kids Time Fun”; Second choice: “Learn Time”
Center 2 Computer center: (A) Elapsed timehttp://www.ixl.com/math/grade-3/elapsed-time; http://www.ixl.com/math/grade-3/elapsed-time-ii (B) Additional website: http://www.adaptedmind.com/p.php?tagId=1086 (C) Computer: Excel worksheet.
Center 3- What is the Elapsed time? (A) "A fun Day" worksheet activity;(B) For Advanced Students- Elapsed Time Story problem. Use calculators to solve story problems. Once a student is done with “A Fun Day” activity, work on story problems.
Materials: Big clock, little clocks (analog, and digital clock), I pads, video, computers, Elmo, story book, activity worksheets.
Reinforcement: Homework activity-explain (2 min) Elmo: Students will record the start and end time of five of their after school activities and calculate elapsed time for each activity.
Evaluations: Wrap up: Our lesson objective was to understand Elapsed Time. Who can tell me what is elapsed time?  Show me by using the scale one through five if you understood the Elapsed Time.  Thumbs up if you liked this lesson, or thumbs down if you didn't.
Ticket Out (5 min): Write down the name of one of your favorite activities that you did yesterday or today and approximately write the time when it started, when it ended and find the elapse time.