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In this self-measuring activity, learners measure and record the length of their foot.

1 cent - $1 per group Ages 4 - 11 30 to 45 minutes
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In this math lesson, learners explore the concept of using units to measure length. Learners first read "How Big is a Foot" by Rolf Myller and learn about units.

$5 - $10 per group Ages 4 - 6 45 to 60 minutes
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Using a real-size sketch of a baby elephant's footprint, learners estimate, measure and record the width (diameter) and outside edge length (perimeter or circumference) of the footprint.

1 cent - $1 per group Ages 4 - 11 30 to 45 minutes
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This activity (located on page 2 of PDF) introduces learners to the real size of animals using nonstandard measurement.

$1 - $5 per group Ages 4 - 11 10 to 30 minutes
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In this activity, learners mark their height on a height chart and discover how tall they are in nanometers.

1 cent - $1 per group Ages 4 - adult 5 to 10 minutes
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In this math activity, each learner creates a book about themselves using a template. Learners discuss the different parts of the body and practice measuring their body parts using crayons.

1 cent - $1 per group Ages 4 - 6 30 to 45 minutes
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In this activity, learners investigate circulation and measure their own your heartbeat. A heart rate, or pulse, is the number of times the heart beats per minute.

1 cent - $1 per student Ages 4 - 11 Under 5 minutes
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In this activity learners will plant grass seed and track the growth of the grass over time.

$5 - $10 per group Ages 4 - 8 1 to 4 weeks
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In this activity, learners explore the size and scale of dinosaurs. Learners listen to "The Littlest Dinosaurs" by Bernard Most. Then, learners estimate the size of a Triceratops and T.

1 cent - $1 per group Ages 4 - 6 45 to 60 minutes
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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.

free Ages 4 - 14 5 to 10 minutes
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In this self-measuring activity, learners observe and record how many times a minute they blink, take a breath, and chew, as well as how many times a minute their heart beats.

1 cent - $1 per group Ages 4 - 14 30 to 45 minutes
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In this activity, learners explore and experiment how we can use our bodies everyday to get from one place to another.

1 cent - $1 per group Ages 4 - 8 10 to 30 minutes
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In this "Sid the Science Kid" activity from Episode 107: My Shrinking Shoes, learners observe how plants change as they grow.

$5 - $10 per group Ages 4 - 6 1 to 4 weeks
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In this activity, learners will be working with predictions with a time frame of one week, or longer. Start by planting seedlings.

$1 - $5 per group Ages 4 - 14 1 to 4 weeks
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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

free Ages 4 - adult 10 to 30 minutes
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In this activity, learners use their senses to collect information about a fruit and record their findings in a Science Journal.

$10 - $20 per group Ages 4 - 8 45 to 60 minutes
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Put math of measurement into lining up — and make waiting in line fun. Choose a size characteristic that learners can physically compare, such as foot length or hair length.

free Ages 4 - 14 5 to 10 minutes
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In this activity, learners will construct a measuring device (snake "string") to improve their observation skills.

$1 - $5 per student Ages 4 - 14 5 to 10 minutes
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In this activity, learners explore a scale by comparing objects, which look similar but have different weights. Learners predict and then measure the weights of various objects using a scale.

free Ages 4 - 6 10 to 30 minutes
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In this activity, learners sniff out scents hidden in balloons! After investigating, learners discover we sometimes can use another sense (smell) to detect things too small to see.

$5 - $10 per group Ages 4 - adult 5 to 10 minutes