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In this activity, learners use their hands as tools for indirect measurement.

In this activity, learners use an astrolabe to measure the altitude of objects. Learners will first practice taking measurements by measuring the altitude of trees and buildings.

In this activity, learners use a hand-made protractor to measure angles they find in playground equipment.

In this activity, learners will measure the length of their shadow from the Sun and compare it three to four months later.

In this activity, learners measure the diameter of their water balloons, model an impact, measure the diameter of the “crater” area, and determine the ratio of impactor to crater.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

In this math activity, learners will create a scale diagram of their backyard or other outdoor area on graph paper.

In this activity, learners explore how and why rainbows form by creating rainbows in a variety of ways using simple materials. Learners create rainbows indoors and outdoors.

In this math activity, learners observe and sketch cracking patterns in pavement.

In this math lesson, learners estimate distances between landmarks and use a map and scales to determine the actual distances.

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 math lesson, learners use a variety of manipulatives to explore spatial relationships of squares and their transformations.

In this outdoor biology and math activity, learners estimate the size of a population of organisms too numerous to count.

In this activity, learners discover that one way to cool an object in the presence of a heat source is to increase the distance from it or change the angle at which it is faced.

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.