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In this math lesson, learners compare products to determine the best product.

In this math lesson, learners make estimates to analyze the number of apples per acre, and visualize the magnitude of one million.

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

In this math lesson, learners apply mathematical modeling to solve a real-world storage problem, in which a manufacturing company is given two options for storing oil barrels.

In this math lesson, learners apply the Monte Carlo method of simulation to determine a reasonable estimate.

In this math lesson, learners design an experiment to model a leaky faucet and determine the amount of water wasted due to the leak.

In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

In this math lesson, learners apply the concepts of ratio and proportion to the capture-recapture statistical procedure.

In this activity, learners investigate the food, water, and space needs of common livestock animals.

In this activity, learners explore the potential of interchangeable standard parts to create a large number of unique creations in different combinations.

In this outdoor activity, learners investigate the relationship between the slope of a trail and soil erosion.

In this space science activity, learners explore transits and the conditions when a transit may be seen.

In this activity, learners build and play three math games. In the first game, called "Switcheroo," learners place marbles in holes 1 through 4 and 7 through 10.

In this math lesson, learners count and compare amounts of money less than or equal to one dollar.

The major goal of this math lesson is to have learners collect data from a variety of experiments, determine what models best fits their data, and explain why their models are best.

In this math lesson, learners identify the relationship between the number of sides in a regular polygon and the number of struts needed to make each polygon rigid.

In this math lesson, learners participate in a variety of activities that give them experience in recognizing, describing, and extending repeating and arithmetic patterns.

In this math lesson, learners determine and compare the rate of descent of various learner-constructed parachutes. Learners construct parachutes that will have maximum hang times.

In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).

In this small-group activity, learners assume the roles of pilots, air traffic controllers, and NASA scientists to solve five Air Traffic Control (ATC) problems.