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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.

This PDF contains 12 calendars (12 months). Each month contains activities about math. Things to do on familiar holidays (like July 4), less common holidays (like Backward Day), and any day.

In this activity, learners build a 1:140 "scale model" of NASA's X-33 Reusable Launch Vehicle (RLV) Technology Demonstrator, and investigate how the model dimensions compare to the real vehicle.

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

In this activity (page 23 of PDF), learners conduct an experiment to determine how the size and mass of a projectile affects the area and the volume of an impact crater.

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

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 math lesson (on Page 13), learners predict and simulate the likelihood of an event occurring.

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.

In this outdoor activity, learners plan a simple foot path and create an environmental impact study of the natural area where the path would be.