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In this activity, learners develop their understanding of combinations as they create as many different kinds of tostadas as possible.

In this activity, learners explore scale by using building cubes to see how changing the length, width, and height of a three-dimensional object affects its surface area and its volume.

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

In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth.

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

In this activity (located on page 10 of the PDF), learners explore the properties of spraying and dripping water, while making art.

In this math activity, learners use cubes to calculate how many blocks it would take to build stairways with different heights.

In this activity, learners follow clues to find five puzzle pieces, then assemble them. This activity works well with a whole group, individuals, or families.

In this math activity, learners make their own bubble wands and determine if the size of the wand affects the number of bubbles it produces.

In this activity, learners combine counting, area and perimeter concepts as they prepare the seating arrangement for a family reunion dinner.

In this math lesson, learners explore variables and their uses.

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.

This is a deceptively simple game to teach strategy, planning, and pattern analysis. In this game, learners take turns removing tokens from a board, and develop a plan to take the last piece.

In this activity, learners explore patterns and sequences as they observe fictional plant growth.

In this activity, learners will estimate how many seeds are in a fruit or vegetable, then count to find out. The result: mix estimation with healthy eating.

Learners make their own simple slide rules out of paper and learn how they work.

In this card game, learners make two sets of three cards that are alike. Learners must justify to the rest of the players why the three cards belong in each set.

In this math activity, learners create a magic turtle where all the rows, columns and diagonals add up to fifteen.

In this math activity, learners play a game and identify patterns with fun moves and sounds. Discover how dancing and signing involve patterns.

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