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Feed the Birds
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Learners construct a bird feeder from re-used materials. After hanging their feeder, they keep a journal about what birds visit the feeder.

Piles of Paper: Estimate Paper Use
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In this activity, learners keep track of how much paper the group uses in a week. Build awareness of paper waste, while strengthening measurement and estimation skills.

Divide and Conquer: Santa's Dirty Socks
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This activity introduces the idea of "divide and conquer" using a fictitious but serious problem--a pair of dirty socks has accidentally been wrapped in one of the presents that Santa is about to deli

Exploring Tools: Mitten Challenge
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In this activity, learners build a LEGO® structure while wearing mittens. This activity shows learners how difficult it is to build small things when your tools are too big.

Gotcha Game
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In this Cyberchase activity, learners play a simple game using 15 paper dragons (or any 15 objects). One of the 15 dragons is red. Learners try to make their opponent take the red piece.

Artificial Intelligence: The Intelligent Piece of Paper
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This activity explores what it means for a computer to be intelligent and introduces the topic of what a computer program is and how everything computers do simply involves following instructions writ

Ice Roads: Steiner Trees
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In this outdoor activity, learners use pegs (like tent pegs) and string or elastic to simulate drill sites and roads in Northern Canada.

Breaking the Code: Mayan Math
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This is a lesson plan for an activity in which learners, playing the role of archeologists, use math concepts about number bases to decipher the Dresden Codex, an ancient Mayan document.

Out of Sight: Remote Vehicle Activity
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In this robotics activity, learners drive a remote-controlled car through a course to learn the challenges faced while trying to operate a planetary rover.

Número misterioso
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Combine la lógica y los números en este juego para todas las edades.

Planetary Rescue Squad
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This is an online Flash game where learners can experiment with ballistics and how to compensate for the varying levels of gravity found on the planets of our Solar System.

Cardboard Opaque Projector
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In this activity, learners construct a projector out of cardboard to view their favorite images (such as storybook illustrations) on the wall.

Super Soaker
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In this activity (page 1 of the PDF under SciGirls Activity: Bogs), learners will test cups full of potting soil, sand, and sphagnum moss to see which earth material is able to soak up the most water.
Take Ten: Cleaning Up is Fun
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In this activity, learners will make cleaning up more fun with predictions and counting. Estimate how many things are on the floor (or table), then count as they are picked up.

Population Study Game: Oh, Deer!
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In this activity, learners model a population of deer and see how the number of deer changes over time.

Slowing the Flow
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In this experiment, pairs of learners explore how cold water affects circulation. The mammalian diving reflex (MDR) slows circulation when the body is exposed to cold water.

Rates of Change: Bottles and Divers
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In this math lesson (page 2 of the PDF), learners use bottles of various shapes to explore the abstract concept of rate of change.

Football
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In this math activity (Page 10 of the Play Ball! PDF), learners play a game of "football" and analyze the results of the game.
Mix & Match Estimation
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In this activity, learners use their estimation skills to match the unmarked containers to their amounts.

Bernoulli's Blowout
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In this quick activity (page 1 of PDF under SciGirls Activity: Kites), learners will witness firsthand the effects of Bernoulli’s Principle by capturing a ping pong ball in the stream of air created b