Lesson plan which details how to have students determine the distance to an object by sighting it from two different locations and knowing the distance between these locations. As an advanced alternative, trigonometry can be used to...

Second graders will be able to estimate the lengths of objects by mentally partitioning the lengths into inches. A video, worksheets, and a detailed lesson plan are included.

Drawings and discussion of several methods to estimate the area of an irregular shape, like the state of Texas.

Estimate the size of a large population (fish in a bay) by applying the concepts of ratio and proportion through the capture-recapture statistical procedure.