there's an educator delivering a mind-altering lesson to their class.

Adam Savage: I want to engage your brains in this.

Chris Anderson: Trying to get my head around how vast our Earth is.

LS: But that lesson only reaches the students in that room.

What would happen if we could capture that lesson?

AS: This is a toothed wheel.

LS: What if, oh, animators and visualization artists could bring that lesson to life?

CA: There's an object we see every day that would literally fit one million Earths.

AS: It's got a bunch of notches, and it's got a bunch of teeth.

This was Fizeau's solution.

LS: When that lesson lands, curiosity is ignited.

CA: It seems impossibly big.

AS: Something interesting happens.

CA: But in the great scheme of things, it's just a pinprick.

AS: A door is starting to close on the light beam that's coming back to his eye.

LS: Then that group of students is one thought closer to being

what every teacher hopes their students will become:

a lifelong learner.

AS: Based on the difference between the two stations.

CA: The quest for knowledge and understanding never gets dull. It doesn't.

AS: He calculates the speed of light to within two percent of its actual value.

CA: The more you know, the more amazing the world seems.

LS: That's the central mission of TED-Ed --

to capture and to amplify the voice of the world's greatest teachers.

AS: He does this in 1849.

CA: It's the crazy possibilities, the unanswered questions, that pull us forward.

So stay curious.

(Music)

Stephanie Lo: TED-Ed is really an invitation to teachers all around the world

to submit their best lessons.

Jordan Reeves: We review each submission, and we work with the educators

to refine the lesson and make sure that they're less than 10 minutes long.

Bedirhan Cinar: From there, we mail out these portable recording booths.

A teacher pulls up their final lesson, presses record,

and then can instantly share it with our animation team.

SL: It's also an invitation to animators.

We are looking for talented animators to get involved,

submit their reels, and help us animate these incredible lessons.

LS: Right now, there's a gifted educator somewhere out there delivering a life-changing lesson.

The TED-Ed Team hopes that anyone who's passionate about education

will help us find that teacher, capture that moment,

and amplify it the way that it deserves to be amplified.