In this learning activity, you'll identify behaviors of the three ego states and practices their use.

In this 3D animated object, learners examine the way in which a three-phase generator produces three sine waves with three armature coils. A quiz completes the activity.

In this animated and interactive object, learners examine the properties of liquids, solids, and gases.

In this animated activity, learners study how stator poles create a rotating field in a three-phase AC motor as a three-phase AC voltage is applied.

In this learning object, you will learn the three tips to better resolve conflict with others.

In this learning activity you'll identify TCP and UDP port states and how they behave during interaction.

Learners view images of the presidents of the United States and click on the name of the president shown.

In this learning activity, you'll identify the three types of sexual harassment.

This document is a visual and text description of the three-wire method for measuring screws for use with a lathe.

In this animated object, learners examine the mechanical configuration of a three-way switch and how it operates in a circuit. They also view diagrams showing the use of an ohmmeter to determine the electrical connections.

Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.

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 interactive object, learners follow steps to find phase voltages in a partial three-phase power distribution circuit.

Learners review the three formulas for power and work 12 problems. In each of the problems, students are given two of the three variables (voltage, resistance, or current) and asked to solve for power. Immediate feedback is provided.

Learners test their knowledge of the framework of the U.S. government in this 13-question quiz.

Learners test their ability to visualize a three-step block in this interactive exercise that features animated pictorial views.

Learners read descriptions of three work teams and decide how to assign four recently hired employees who are new to the United States.

Learners review the three formulas for power and work 12 problems. In each of the problems, students are given two of the three variables (voltage, resistance, or current) and asked to solve for power. Immediate feedback is provided.

In this interactive object, learners examine the characteristics of osteoarthritis, rheumatoid arthritis, and osteoporosis. Students then describe the precautions to be aware of when working with clients who have arthritis and identify assistive devices that clients might use to prevent injuries at home.

2D and 3D views used to help convey information from a drafter or designer to the welder are provided. This activity will focus on a three-step block. A short quiz to test your ability to correctly read this information follows.