In this learning activity, you'll watch an animated explanation of the terms class and object as used by computer programmers, and then contrast the differences.

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

In this animated activity, learners read an explanation of the four different modalities (currents) used in electrotherapy.

Learners view an animated explanation of why an adjustment of the output voltage by an AC drive is required to maintain a constant torque as the frequency is varied.

In this animated object, students view an explanation of how current, voltage, and the magnetic field strength of a series RL circuit change during five time constants. A brief quiz completes the activity.

In this animated object, learners examine the operation of a summing operational amplifier through formulas, tables, and animated illustrations. A brief quiz completes the activity.

In this animated object, students view an explanation of how current, voltage, and the charge on a capacitor of a series RC circuit change during five time constants. A short quiz completes the activity.

In this animated object, learners examine the recommended procedure for troubleshooting a defective JK flip-flop using a logic pulser and probe.

In this animated and interactive object, learners follow oral directions in the workplace. They complete their task within a time limit. This object has audio content.

Students read an explanation of power factor in a power distribution and how it can be improved by using a power factor correction capacitor bank. A brief quiz completes the activity.

In this animated activity, learners view the various hand, arm, and shoulder muscles in action. The students test their knowledge of the location of the muscles in a drag-and-drop exercise.

In this animated activity, learners examine how to change the gain of an optical sensor to overcome environmental conditions and distance.

In this animated object, learners study the problems that develop if the scan time of a PLC is too slow.

In this animated activity, learners examine procedures in a doctor blade metering system.

In this screencast, learners read an explanation of the color code used on schematic diagrams for hydraulic circuits. Circuit examples for each color are shown.

In this animated activity, learners examine the terms "half-reaction," "oxidizing agent," and "reducing agent" and follow five interactive examples to balance equations for oxidation-reduction reactions. Three problems are provided as a self-check.

Learners view an animated presentation showing how the pH level of a cleaning solution is controlled in a closed-loop system in a manufacturing setting. A quiz completes the activity.

In this animated object, learners study the operation of a linear voltage differential transformer. A brief quiz completes the activity.

Students read an explanation of the use of weight-volume relationships and practice calculating density.

This animated lesson an exercise that enables students to design a ladder logic circuit using a drag-drop function to cause the cylinder of a hydraulic circuit to extend and retract.