Learners watch a brief video clip. They then follow step-by-step instructions on how to do a urine colony count and examine the criteria for determining if a colony count represents an infection. A brief quiz completes the object.

In this animated object, learners examine the mechanisms for gas exchange among the lungs, blood, and tissues.

In this screencast, we'll view the 10 major bones of the skull and read a description of each bone.

In this colorful and interactive object, learners examine the structure and function of muscle and connective tissues. A quiz completes the activity.

In this learning activity you'll practice converting from one metric unit to another.

Learners read a description of the wiring configuration of a residential Edison Wire System, which consists of a transformer secondary circuit. The circuit supplies two 115-volt sources and one 230-volt source.

Learners take a close look at the Edison Wire System and observe how the current values through the two lines and the neutral of the system change as the loads vary.

Learners view the waveforms and voltages of an Edison Three-Wire System and read a description of the polarities across the secondary of the center-tap transformer. This transformer supplies power to residential homes.

In this animated object, learners read a brief description of the roles of the hypothalamus, emotions, and adrenal secretions during the stress response.

Female Reproductive System

Match the head injury with it's description as quickly as possible!

Use the definition to guess the word or prefix and save the moon!