In this learning activity you'll discover how perception of size is influenced by what's surrounding an image.

Students determine what happens to current flow in a series circuit when the resistance is changed. A brief quiz concludes the activity.

In this screencast, learners examine why the piston of a hydraulic cylinder extends slower than it retracts. A brief quiz completes the activity.

In this animated activity, learners examine the operation of normally open and normally closed valves used in hydraulics. A brief quiz completes the learning object.

In this learning activity you'll discover how perception influences understanding.

Learners are shown questions to ask themselves before they speak. They evaluate three responses according to the criteria presented. This activity has audio content.

In this learning activity you'll analyze political cartoons following a two-step process to unlock their meaning.

Learners see how a bridge rectifier converts an AC voltage into a pulsating DC voltage. A brief quiz completes the activity.

In this animated activity, learners examine the operation of a pneumatic cylinder that continuously cycles by extending and retracting.

In this learning activity you'll review the differences between identification, authentication, and authorization.

In this learning activity you'll identify various types of unshielded twisted pair cables and their networking connectors.

In this activity you will learn the benefits of SSH, Secure shell, versus plain FTP.

Students examine how voting rates are determined and how those rates change depending upon the population being studied. A brief quiz completes the activity.

In this learning activity you'll review the parts of a three-roll power roller and practice identifying them.

In this learning activity you'll read a police investigation report and click on correct report entries in parentheses.

In this animated and interactive object, learners study how a DC circuit, consisting of a diac, a capacitor, and two resistors, causes a light-emitting diode to turn on and off. A brief quiz completes the activity.

In this learning activity you'll produce a personal listening improvement plan based on good listening techniques.

In this learning activity you'll explore the Slippery Slope fallacy.

This project gives a drawing with steps to complete the activity.

In this interactive object, learners examine the characteristics of effective visual displays. This activity is designed primarily for instructional assistants.