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A fun way for students to practice putting books in order so they can better understand call numbers.

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Watch the video, and pause at 1:12 to think of a solution. Then continue to discover a solution (math involved!).

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Can you solve the seven planets riddle? - Edwin F. Meyer

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Watch the video, then pause at 1:12 to think of a solution. Then continue to discover a solution (math involved!).

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Let's Begin...

It's an incredible discovery: an abandoned alien space station filled with precursor technology. Now every species in the galaxy is in a mad dash to get there first, but you've got a problem. Your ship can't hold enough fuel to get you there unless you vent caches of it into space at precise points and then come back for the fuel later. Can you reach the alien space station? Dan Finkel shows how.

Create and share a new lesson based on this one.

About TED-Ed Animations

TED-Ed Animations feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TED-Ed Animation? Nominate yourself here "

Meet The Creators

Educator Daniel Finkel

Director Igor Coric

Narrator Addison Anderson

Animator Nemanja Petrovic

Sound Designer Nemanja Petrovic

Director of Production Gerta Xhelo

Editorial Producer Alex Rosenthal

Associate Producer Bethany Cutmore-Scott

Fact-Checker Eden Girma

See more creators

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Can you solve the dark matter fuel riddle? - Daniel Finkel

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It's an incredible discovery: an abandoned alien space station filled with precursor technology. Now every species in the galaxy is in a mad dash to get there first, but you've got a problem. Your ship can't hold enough fuel to get you there unless you vent caches of it into space at precise points and then come back for the fuel later.

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Get into groups and play this 4-lock digital game + reflect!

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Get into groups to play this 5-lock digital game + reflect!

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Get in teams of 4-6. Teams get a stack of cards with Dewey Decimal call numbers. First person in line takes a card and goes to find the library book. Leave card on shelf in book's place + bring book back to team. Next player gets next card. Repeat until all team members have had 1 turn. If time, team members re-shelve their book + return cards to teacher.

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10 questions to show what you know!

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Join a game of kahoot here. Kahoot! is a free game-based learning platform that makes it fun to learn - any subject, in any language, on any device, for all ages!

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10 questions to show what you know!

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Join a game of kahoot here. Kahoot! is a free game-based learning platform that makes it fun to learn - any subject, in any language, on any device, for all ages!