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# More Bidding Challenges

Media Type:
Video

Running Time: 5m 26s
Size: 15.0 MB

or

Source: Cyberchase: “Snelfu Snafu, Part 1”

### Collection Developed by:

Collection Credits

### Collection Funded by:

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

In this video segment from Cyberchase there is a valuable Encryptor chip being auctioned off that the CyberSquad needs to purchase in order to save Motherboard. At first it looks like it will take about 100 Snelfus to win the bidding and the squad develops a plan to save that many Snelfus in the eleven days they have left before the bidding ends. As Hacker continues to bid, however, the price goes up and the squad must adjust their plans.

Connections

Everyday Math (2004)
Teacher Lesson Guide, pp. 105, 462, 920
Teacher Reference Manual, pp. 145-148
Student Reference Book, pp. 69

Investigations/Scott Foresman (2006)
Changes Over Time
All Investigations in this volume.

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: Let’s say you were saving up for a bike that cost \$75. You found a job weeding gardens that paid \$10 a day and you figured that within 8 days you would have enough money to buy the bike. Then you find out that the price of the bike will go up to \$95 in 8 days. What would you do to adjust your work/savings plan?

Focus: Once Hacker has bid 450 Snelfus for the Encryptor chip, the CyberSquad realizes they will have to change their savings plan again in order to earn more Snelfus. What do they change and how do they decide on their new savings plan?

Follow Up: Hacker bid 150 Snelfus for the Encryptor chip, and the CyberSquad adjusted their savings plan. Then Hacker bid again and brought the price to 450 Snelfus.How did the squad adjust their savings plans each time, and how did they know how much to adjust it? If you are saving to reach a goal of \$500 and you have a set amount of time in which to do it, how would you plan to save? If your goal changed to \$600, how would you adjust the plan?

Transcript

INEZ: Here are the ten snelfus we earned on day two.

JACKIE: Plus the ten snelfus we earned yesterday, gives us a total of…

ALL: Twenty snelfus!

SLIDER: Only eighty to go.

INEZ: And eight days to earn it.

MATT: The money’s adding up, just like we thought it would.

JACKIE: Yes, our plan’s working perfectly.

DIGIT: Except for one little problem that isn’t so little.

ALL: Hacker!

COWBOY: One hundred snelfus.

HACKER: Partner you’re talking through your hat. You know what that means? COWBOY: Nope.

HACKER: Show ‘em boys…One hundred and fifty snelfus!

AUCTIONEER: The Hacker bids one hundred and fifty snelfus.

ALL: Oh no!

MATT: Now we need even more money to buy the chip.

DIGIT: What are we going to do?

INEZ: Well, we just have to keep doing what we’ve been doing because we know that saving the same amount every day works. But instead of saving ten snelfus a day, we’ll have to save more.

DIGIT: How much more?

SLIDER: I’d say we need at least two hundred now.

JACIE: Oh man, that’s twice as much as we planned.

DIGIT: And we only have nine days left to save it.

SLIDER: But if we double our savings every day we could save twice as much. Just a few more adjustments. There.

JACKIE: Twenty snelfus a day for nine days would be one hundred and eighty.

INEZ: Plus the twenty we already have, that will give us the two-hundred we need.

WICKED: The team of Wicked and Hacker bids four hundred and fifty snelfus. OK with your Hacky poo?

HACKER: I’m thrilled.

DIGIT: Yikes, we’re sunk now.

INEZ: To beat their new bid I think we need at least five hundred snelfus.

JACIE: And we only have five days left. It’s impossible. We’ll never do it.

SLIDER: At least we’ve got a hundred saved.

MATT: But we need five hundred. That’s four hundred more.

SLIDER: Chill, OK? We’ll figure out a new goal to save everyday just like before.

JACKIE: Make room, I’ve got a pace. If we had ten days and we saved forty snelfus a day that would be four hundred because ten times forty is four hundred.

DIGIT: But we only have five days, half that time.

INEZ: So we need to save twice as much each day. That’s eighty snelfus.

MATT: Right. Eighty snelfus a day for five days will give us four hundred.

DIGIT: Eighty snelfus a day, can we do it? It’s so many.

INEZ: Dig is right. We’re already working at our max.

SLIDER: Too bad there aren’t more of us.

MATT: That’s it, Slider, we need more help. We’ll ask everyone in Cyberspace to help us save.

JACKIE: If you care what happens to Motherboard, now is the time to act.

INEZ: Give up yourself for the good of the community.

MATT: Ask not what Motherboard can do for you.

DIGIT: But what you can do for Motherboard.

ALL: Woo-hoo.

DIGIT: We did it.

JACIE: We saved five hundred snelfus.

MATT: Now we can save Motherboard.

AUCTIONEER: The total still stands at four hundred and fifty snelfus, and there is only one minute left to bid. If there are no more bids in the next sixty seconds the Encryptor chip will belong to Hacker.

HACKER: That’s “The Hacker” to you.

WICKED: Make that The Hacker and Ms. Wicked.

AUCTIONEER: It isn’t too late. There’s still thirty seconds left to bid. We’re at four fifty. Do I hear four seventy-five?

BUZZ: Four seventy five.

HACKER: What?

DELETE: Four eighty.

HAKKER: Sit down you duncebuckets.

WICKED: Four ninety.

HACKER: Four ninety five.

AUCTIONEER: Ten seconds left folks. Any more bids? With the fate of Motherboard hanging on this chip. We’ve got four hundred ninety five snelfus. Going once, going twice, going…

DIGIT: Five hundred.

HACKER: You can’t do that you sorry-looking cyber turkey.

AUCTIONEER: Five hundred, going once…

HACKER: That chip is mine.

AUCTIONEER: Going twice…

HACKER: You’ll never have that chip.

WICKED: Hacky, hacky, bid.

AUCTIONEER: Sold! The Encryptor chip goes to the funny-looking bird with the propeller!

Standards

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