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This activity (on page 2 of the PDF under SciGirls Activity: Music and Sound) is a full inquiry investigation into sound frequency.

$5 - $10 per group Ages 8 - 14 1 to 2 hours
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Choose a recipe to double (or triple, quadruple, or halve). Show everyone the recipe and engage them in figuring out: How much will we need to increase the recipe to feed everyone?

1 cent - $1 per group Ages 4 - 14 30 to 45 minutes
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In this activity (page 4), learners work in groups to plan and build large structures using recyclable materials they have brought from home.

$1 - $5 per group Ages 6 - 14 30 to 45 minutes
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In this activity, learners make their own Sun tracker to explore how ancient civilizations around the world studied the Sun.

$1 - $5 per student Ages 6 - adult 10 to 30 minutes
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In this activity, learners design and build a simple wind vane —one of the oldest kinds of weather tools— and use it to show wind direction.

$5 - $10 per group Ages 8 - 14 30 to 45 minutes
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This activity is a hit for family events and all ages—some will finish in 45 minutes; others can go on for hours.

1 cent - $1 per group Ages 6 - 14 45 to 60 minutes
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In this archaeology activity, learners consider ways in which excavating an underwater site is different from excavating a terrestrial site.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this three/four-day lesson, learners calculate perimeters and areas and draw the castle plan to scale.

$5 - $10 per group Ages 8 - 14 1 to 7 days
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In this math lesson, learners make estimates to analyze the number of apples per acre, and visualize the magnitude of one million.

Over $20 per group Ages 8 - 11 1 to 2 hours
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In this activity, learners make or use pre-made clay beams to scale and proportion. Specifically, they discover that when you scale up proportionally (i.e.

$10 - $20 per group Ages 4 - 14 45 to 60 minutes
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In this math lesson, learners participate in several activities where they apply measurement skills.

$5 - $10 per group Ages 8 - 11 45 to 60 minutes
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Learners create an Incan counting device called a quipu (pronounced kee-poo).

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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In this activity, learners take measurements and create charts to learn about the size of dinosaurs and their relative scale to humans.

$5 - $10 per group Ages 8 - 11 1 to 2 hours
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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.

1 cent - $1 per group Ages 8 - adult 2 to 4 hours
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In this activity, learners will participate in a scavenger hunt involving sizes, shapes, and numbers. This activity works well with a whole group, individuals, or families.

1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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This activity encourages learners to focus on the natural environment of the Eastern Woodlands before the arrival of European settlers.

$1 - $5 per group Ages 4 - 11 45 to 60 minutes
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In this on site "field trip" activity (located on pages 6-9 of PDF), learners get hands-on experience identifying building materials by playing "Building Bingo".

free Ages 8 - 14 1 to 2 hours
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In this activity with several mini experiments, learners explore the chemistry that helps scientists learn about the environment and how they can help save it.

$1 - $5 per group Ages 8 - 14 4 to 24 hours
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In this activity, learners imagine what the world might look like if we could build an elevator to space!

1 cent - $1 per student Ages 4 - adult 10 to 30 minutes
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Build your own Mini Mini Golf Course and learn about hands-on building and design, basic circuitry, motion modules and more!

$5 - $10 per student Ages 8 - 18 1 to 4 weeks