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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: Circles have a radius, a diameter, an area and a circumference. Sometimes it's helpful to know the diameter of a circle—like with a bicycle tire or a pizza. Other times it's more helpful to know the circumference—like when you want to make a circular fence around a trampoline or swimming pool. What is the relationship between the circle's radius and its diameter? Can you think of other things that are measured by their radius or diameter?
Focus: Pay attention to how the CyberSquad figures out the circle's circumference based on its diameter. Note what the relationship is that exists between the diameter and the circumference.
MATT: I don’t know what Hacker’s up to, but we gotta get outta here fast!
JACKIE: How? We can’t even get through the gate to get to the code book!
DIGIT: Yes we can!
DIGIT: I forgot about this!
DIGIT: First you put in a cyber-coin. Then you get a can. All the cans in here have a key to open the gate! All ya do is pick the label that fits the can - ya know, the one that goes all the way around the can just right.
INEZ!/JACKIE/DIGIT: How about this one?/Uh-uh, I think it’s this one?/No, the long one!
MATT: Let’s just try this one!
MATT: Nope, too short!
MATT: Sorry...
JACKIE: Didge, we need another coin!
DIGIT: Right. Last one. So no guessing this time.
INEZ: We need to figure out for sure which label fits the can. How do we do that?
MATT: I’ve got it! I can measure around the can with this licorice.
MATT: No I can’t, it keeps slipping. But wait! I can measure the diameter. Does that help?
INEZ: Dunno... Do you think there’s a way to use the diameter to figure out the circumference?
JACKIE: Worth a try! Let’s measure some circles and see. Let’s try this round rock.
MATT: First the diameter.
JACKIE: And now the circumference.
JACKIE: Man, the circumference is a lot longer than the diameter!
JACKIE: About one...two...three times longer!
DIGIT: So it takes a little more than three diameters to equal the circumference of this circle!
INEZ: Let’s see if the same is true for this bigger circle!
INEZ: The diameter...and the circumference.
MATT : Huh! Different size circle, but same result: the circumference is still a little more than three times the diameter. We’re good to go!
JACKIE: What was that?!
DIGIT: The most terrifying Creeper of all--the King Creeper!
JACKIE: We gotta get through that gate NOW!
MATT: Okay, the diameter is this long!
INEZ: And we know the rule: to reach all the way around, the length of the label has to be a little more than three times the diameter!
MATT: Whoa!
DIGIT: Hurry...measure it already!
MATT: One diameter, two diameters, three diameters...and a little bit more!
MATT: Now we need the label that matches this length! Touchdown!
JACKIE: All right!
JACKIE: It fits just right!
JACKIE: Yes! I got the key!
DIGIT: Open the gate! Open the gate!
INEZ: Hurry! Hurry!
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