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In this activity, learners explore the different salinities of various sources of water by taste-testing.

As learners play this strategy game, they develop understanding of squares, area, and perimeter. On each turn, a player draws a line between two dots next to each other on the grid.

In this activity, young learners will explore shapes, textures, and geometries using household materials.

In this activity, learners use squares to figure out how many border tiles are needed to enclose different areas.

In this activity, learners use number sense and mental math strategies to estimate the price of a sign.

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 .

In this activity, learners discover how the extent of various wind speeds changes in each of the four quadrants around a hurricane.

In this math game, learners try to earn the most points by winning stacks of four dice. Learners practice number recognition and addition skills.

Learners use M&Ms® (or any other multi-color, equally-sized small candy or pieces) to create a pie graph that expresses the composition of air.

As learners play this game, they build skills in area, perimeter, multiples and factors. They take turns making rectangles with 12 squares on the grid.

Esta actividad enseña la proporción y razón por hacer que los aprendices hagan "ensaladas" que combinan tres tipos de frijoles en tres combinaciones diferentes.

In this quick activity about size and scale (on page 2 of the PDF under What's Nano?

In this online activity, learners will brush up on their multiplication, division, and factoring skills with this exciting game.

In this activity, learners build a scale model of the solar system using a roll of toilet paper.

This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo.

In this calculus activity, learners use a classic problem of geometrical probability to find an important mathematical constant (pi).

In this math activity, learners jump and measure how far they can jump on different surfaces using different jumping techniques.

In this math game (Page 14 of the Are You Game? PDF), learners determine the probability of getting an even versus an odd product using the numbers on a regular deck of cards.

In this online interactive, learners use fossils to infer temperatures 55 million years ago, at the sites where the fossils were found.

Learners create an Incan counting device called a quipu (pronounced kee-poo).