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Cooking Contest

Resource for Grades 3-6

| Citation

Media Type:
Video

Running Time: 1m 09s
Size: 3.9 MB

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Source: Cyberchase: "A Time to Cook"

Learn more about Cyberchase.

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Funding for the VITAL/Ready to Teach collection was secured through the United States Department of Education under the Ready to Teach Program.

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Figuring Out Elapsed Time
(Video)

In this video segment from Cyberchase, Digit is competing against Hacker in a cooking contest. Digit has to finish cooking before a snowstorm hits but he is not sure how much time he has left. He does know what time it is and when the snowstorm is due. Matt uses subtraction to help him calculate how much time he has.

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Teaching Tips

Here are some Frame, Focus and Follow-up suggestions for using this video in a math lesson.

What is Frame, Focus and Follow-up?

Frame: If it is 3:00 in the afternoon and you have soccer practice at 5:30 p.m., how much time do you have before practice begins? How do you calculate this? What if it is 2:35 p.m. and you must leave your house at 2:50 p.m.? How much time do you have before you leave? How do you know?

Focus: In this video segment, Matt helps Digit calculate how much time he has left to finish preparing his recipe. What two facts does Matt know that help him figure this out? What mathematical operation does he use?

Follow Up: How much time did Digit have left to complete the recipe? How did Matt figure it out? Is there another way to figure it out? How? If you are at school from 9 a.m. to 3:30 p.m., how much time do you spend in school in one day?

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Transcript

MATT: Snowed in by nine forty-three? It’s already nine twenty-seven!

DIGIT: And I still need to frappe the puree! How much time do I have?

MATT: We know what time it is now - and we know what time we have to finish by. I'll just count the minutes in between. Nine twenty-seven...nine twenty-eight...Oh, man, I can't count the minutes with these mittens on - and it's too cold to take them off!

DIGIT: There's gotta be another way to figure out the time!

MATT: Of course! I don't have to count each minute - I just need to know the difference between the time when I start and the time when I stop. I can subtract!

DIGIT: Subtract what from what?! I gotta know now! Sorry.

MATT: Well, since nine forty-three is later than nine twenty-seven...To find the difference, I put the stop time on the top...and subtract the start time from that. Nine forty-three minus nine twenty-seven is...sixteen! We have sixteen minutes before the blizzard hits.

DIGIT: I only need fifteen! Cut the carrots!