Learners answer questions about ferrous metals and alloys using a game show format. Immediate feedback is provided.

Learners read about the world's largest rain forest. A map is provided.

Learners follow the steps for reducing all of the elements of a complex circuit to a single current source and a single source resistance to create a simple circuit. Several examples are given for dc circuits. The conversion between Thevenin and Norton is also presented.

This animated object allows students to examine the four steps used to reduce a complex circuit to a simple series circuit.

Students analyze the eight single variable Boolean theorems and their expressions.

The superposition theorem is explained as it relates to dc circuit analysis. Examples are given.

Students read the multivariable theorems and view the graphic depictions of the Boolean expressions.

Students read an explanation of "superposition" as a technique for ac circuit analysis. Complex numbers are used.

In this interactive object, learners examine the structural-functional, social-conflict, and symbolic interaction analyses of religion. A mind map and quiz questions are included.

This learning object is designed to assist students in understanding and interpreting collision evidence found in automotive lamps. In particular, the concepts of Hot Shock, Cold Shock, Hot Break, and Cold Break will be visually addressed.