In this video segment from Cyberchase, Jackie competes in a trick bike competition against Brink, a rider for Team Hacker. After Jackie hits the wall during the competition, she suspects that the competition field and the practice field are not the same size. By comparing their perimeters, the CyberSquad tries to find the difference between the two fields.
Investigations/Scott Foresman (2006)
Flips, Turns, and Area (3rd Grade)
Investigation 1, Session 4: pp. 23-26
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: Many sports fields, like a football field or a soccer field, are rectangular. We can measure them in terms of how long they are or how wide they are. We can also measure the distance around the outside of the field. This distance is called the perimeter. We find it by adding up the length of each of the four sides. Could you do this with a piece of notebook paper? Give it a try. Do all the pieces of paper in your class have the same perimeter?
Focus: As you watch this segment, look carefully at the photographs of the practice field and the competition field. The CyberSquad says that both fields are rectangles and have the same perimeter. If that’s true, think about how the fields could be different in shape.
Follow Up: How were the competition field and the practice field different? How were they the same? Can you draw two different rectangles, each with the same perimeter but with different lengths and widths?
OLLIE: It’s time for Round One! Jackie vs. Brink on bikes! And Brink rides first! Whoa! He starts with a 360 tailwhip! Brink segues into a back and forth framestand! Poetry in motion! He throws in some bunny hops for good measure. And a giant peg grind along the rail for a fantastic finish! Judges?! A perfect score of ten! What a way to start the skate-off for Team Hacker!
MATT: Aww... what did I get us into?!
INEZ: I told you, Matt! You can’t always jump into things! How can we beat these guys?
DIGIT: C’mon team, look alive! We practised ...we know the field. Nothin’ to it but to do it!
JACKIE: Digit’s right! Nothing to it but to do it!
MATT: Go get’em, Jax!
INEZ: Jack-ie! Jack-ie! Jack-ie! Jack-ie!
RAD-STERS: JACK-IE! JACK-IE! JACK-IE!
BUZZ/DELETE: The Hacker’s great - The Hacker’s good. Hacker’s the best in the neighbourhood!
OLLIE: Jackie looks totally pumped! She’s got a bunny hop going before she even hits the ramp! And she’s off! A tricky but slammin’ steamroller and she’s out of the half-pipe! And now a no-footed can-can! Whoa! She can’t make that and...oww!! She hits the wall and falls out!!! Oh, no! That is going to be costly! Judges?! Oh, too bad...only a ‘3’ for the Jackster!
JACKIE: I never went out like that in practice. It felt like I ...like I ran out of room inside.
MATT: Hmmmm, I smell a rat. Make that Hacker!
MATT: Time out! Time out! Okay, what do we know?
INEZ: We know that Jackie ran out of room inside the field. But why?
DIGIT: Maybe Hacker pulled the old switcheroo and changed the field!
JACKIE: If only there was some way to compare this field to the field we practised on, maybe we could figure it out.
DIGIT: They say a picture’s worth a thousand woids! Be back in a flash, Earthlies!
MATT: I don’t get it. Ollie measured this field before the skate-off started - so we know they have the same number of fence pieces.
INEZ: And it’s a rectangle so it’s legal - just like our practice field.
JACKIE: So what could Hacker have done to make it different?
DIGIT: Heads up, gang?! I took a snap of the practice field - and one of this field here! And guess what? The shapes are different! See?
JACKIE: Whoa whoa... wait a minute! How is that possible? They have the same perimeter.
MATT: Yeah, the skate field looks narrower than the practice field.
INEZ: But look at them. For some reason, the shapes are different.
JACKIE: That’s why I fell out! The skate-off field was a shape I wasn’t used to!
DIGIT: And you can bet your last fence piece The Hacker did that on purpose!
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