Learners quiz themselves on the conversion factors within and between the metric, apothecary, and household systems.

Students answer 10 questions in a sample exam. This exercise covers number systems, number conversion, logic gates, and combinational design. Feedback is provided.

In this animated object, learners examine automated manufacturing systems classified as motion control, batch process control, and continuous process control.

In this animated object, learners examine how psychotropic medications act on neurotransmitter systems to achieve their desired effect.

In this animated object, learners examine the operation of two-way, three-way, and four-way directional control valves used in pneumatic systems.

Learners examine the operation of positive and non-positive displacement compressors used in pneumatic systems.

Learners review normal conditions that are associated with aging. Changes are highlighted in the cardiovascular, musculoskeletal, respiratory, gastrointestinal, urinary, reproductive, endocrine, nervous, and sensory systems.

Learners examine animations of the most common transmission signals used in automated systems, such as 4 mA to 20 mA, 3 psi to 15 psi, and 0 to 10 volts. A brief quiz completes the activity.

Explore how to prevent injuries caused by falling from ladders or elevated heights by looking at the parts of a ladder, ladder safety rules, and personal fall protection systems.

Learners examine the differences and similarities between hydraulic and pneumatic systems.

In this screencast of an old Flash learning object, learners follow along as we sort parasites into divisions and helminth divisions. We'll also identify affected body systems.

In this animated learning object, learners examine the regulation of inducible operons in bacterial systems.

Students read about the Federal Reserve System's structure and goals and the tools it uses to control the flow of money and credit in the economy. At the end of this activity, learners are asked to write how they would solve specific economic problems if they served on the Fed's Board of Governors.

Learners view the conversion factors within and between the metric, apothecary, and household systems. A quiz completes the activity.

Learners examine the basic types of dimensioning including unidirectional and aligned systems, and linear, aligned, angled, arrowless, chain, datum, chart, tabular, radius, diameter, typical, and reference dimensions.

In this learning activity you'll solve systems of two linear equations in two unknowns by determinants.

Learners read about the different kinds of positions available in the accounting field at private corporations, government agencies, and not-for-profit organizations.

In this interactive and animated object, learners examine Midtronics hand-held battery and charging system testers and view the operation of these testers in an automotive repair facility.

In this animated object, learners examine how the way in which a rheostat is connected in series with other resistors causes current and voltage to change as the resistance is varied.

Learners examine the current and voltage changes in a series-parallel circuit as the resistance value of a rheostat is varied. Illustrations and calculations are included.