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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 math game, learners solve a mind-twisting puzzle using dominoes. Use this activity to help learners practice counting, adding, and solving problems.

$1 - $5 per student Ages 4 - 8 5 to 10 minutes
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In this math activity, learners play a number game to explore the relationships between numbers, combinations, and the concept of equivalency.

1 cent - $1 per group Ages 8 - 11 5 to 10 minutes
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In this math activity, learners make a set of fraction cards to play a game that will help relieve their fraction frustrations.

1 cent - $1 per group Ages 6 - 11 10 to 30 minutes
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In this math activity, challenge learners to make two equal rows from eight different paper strips. Learners can explore the many ways they can solve this problem.

free Ages 6 - 11 5 to 10 minutes
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In this math activity, learners play a game and use a variety of strategies to solve a hidden number problem (or missing factor). Learners practice their number and operations skills.

1 cent - $1 per group Ages 4 - 8 5 to 10 minutes
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In this game, learners use clues to identify mystery shapes. Use everyday objects (like from the pantry) as the shapes.

1 cent - $1 per group Ages 4 - 8 30 to 45 minutes
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In this math lesson, learners use slices of bread and geoboards to explore several ways to divide a rectangle in half. Learners also identify equivalent fractions that represent one-half.

$5 - $10 per group Ages 6 - 11 1 to 2 hours
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In this math activity, learners use cubes to calculate how many blocks it would take to build stairways with different heights.

1 cent - $1 per student Ages 8 - 11 10 to 30 minutes
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In this math game (Page 9 of the Are You Game? PDF), learners determine what makes a spinner fair or unfair. Learners first play a round with a pre-made spinner that isn't very fair.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this math activity, learners create their own units of measurement by making noodle rulers. Learners practice estimating and measuring objects using the noodle rulers .

$1 - $5 per student Ages 4 - 8 10 to 30 minutes
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In this math activity, learners play a card game to practice adding coins quickly, just like a banker. First, learners create coin cards. Next, the cards are dealt to each player.

1 cent - $1 per group Ages 6 - 11 10 to 30 minutes
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In this math activity, learners pretend there is a special store that lets you pay for toys by their height in pennies.

$1 - $5 per student Ages 4 - 8 5 to 10 minutes
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In this math activity, learners role-play as wait staff at the Kidtropolis Diner. It's the end of the night and it's time for the staff to collect their tips.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes
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In this math lesson, learners apply the concepts of ratio and proportion to determine the length of the Statue of Liberty's torch-bearing arm.

1 cent - $1 per group Ages 11 - 14 45 to 60 minutes
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In this math lesson, learners estimate distances between landmarks and use a map and scales to determine the actual distances.

Over $20 per group Ages 8 - 11 1 to 2 hours
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In this math lesson, learners play two different games to help them understand coordinates. First, learners read the book, "The Fly on the Ceiling," by Julie Glass.

1 cent - $1 per group Ages 8 - 11 30 to 45 minutes
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In this math lesson, learners compare pattern blocks to visually understand halves, thirds, and sixths.

1 cent - $1 per group Ages 8 - 11 30 to 45 minutes
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In this math lesson, learners predict, interpret, and sketch graphs of functions related to the shapes of bottles. A measure of water is poured into a container.

1 cent - $1 per group Ages 11 - 14 45 to 60 minutes
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This activity helps learners learn about math through a real-world scenario. Three friends are baking cookies for their school’s bake sale.

$1 - $5 per group Ages 8 - 11 5 to 10 minutes