Indirect Teacher Resources

This activity allows the user to practice estimation skills. Students use three types of estimations: counting, length, and area. An interactive activity and teacher resources are included.

In this activity, students explore map making. Students' read a story, identify the locations of different places in the story, decide the distance between each set of places in the story, and create a map with a legend.

More Pythagorean Theorem examples. Introduction to 45-45-90 triangles.

This QuickTime movie uses a tangram-like puzzle to help understand the Pythagorean Theorem. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.

[Free Registration/Login may be required to access all resource tools.] This study guide looks at similar polygons, scale factor (ratio), and triangle similarity.

In this video, Harry finds money on the sidewalk. He uses ratio, proportion, and some knowledge about shadows to return it to the rightful owner. In the accompanying classroom activity, students investigate whether there is a consistent...

Students set up a simple way to indirectly observe and quantify the amount of respiration occurring in yeast-molasses cultures. Each student adds a small amount of baking yeast to a test tube filled with diluted molasses. A second,...

Mapping the ocean floor must be done by indirect observation. One method involves bouncing a sonar signal off of the ocean floor and measuring the length of time this signal takes to return. This length can be translated into distance:...

[Free Registration/Login may be required to access all resource tools.] Recognize the equivalence of decimal numbers in standard form, product form and scientific notation using very small and very large numbers

Video tutorial explains how to identify corresponding parts in similar figures. [6:28]

Follow along with this tutorial to see an example of how to determine if two given figures are similar. [7:49]