In this learning activity you'll investigate the interaction of antimicrobial therapies and host defenses in eliminating an infection.

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.

In this animated and interactive object, learners examine a depiction of how force is multiplied by a larger cylinder when pressure from a pump is applied to a smaller cylinder. A short quiz completes the activity.

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.

In this learning activity you'll read the steps for proper meter placement for the measurement of resistance, voltage, and current.

Learners view the steps for determining the square root of a complex number in Excel.

Learners examine an animated view of the operation and programming requirements of a PLC Examine-On instruction. A brief quiz completes the activity.

In this learning activity you'll recognize potential safety hazards around grinding equipment

In this interactive learning activity, learners explore factors that contribute to the aging process. Learners calculate their age based on biological, psychological, and social experiences. Further reflection allows the learner to consider options and assess issues that impact the aging process.

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

Learners examine the ways in which a motor starter circuit is protected by a main circuit breaker and overload heaters when there is excessive current.

In this animated activity, learners examine the operation of a dynamic braking circuit used to quickly stop a motor.

Students read about the four steps to creating an ac model and view examples.

Learners examine the internal components of an optical encoder used in automated manufacturing applications. A brief quiz completes the animated activity.

Users complete a self-inventory to determine if their approach to assessment is teacher-centered or learner-centered.

In this animated and interactive object, learners examine the voltages that develop across two series zener diodes, which are connected in opposite directions, when DC and AC voltages are applied across them. A brief quiz completes the activity.

In a drag-and-drop exercise, the learner considers various food items and determines if they improve brain functioning. This learning object is designed for instructional assistants.

In this learning activity you'll review how an open in a series circuit affects current.

Learners examine the changes in current and voltage values in a parallel circuit when open and short conditions develop. Ohm's Law calculations are shown, and a brief quiz completes the activity.

This animated lesson shows how a ladder circuit uses timer-on delays to cause an extrusion machine to operate.

In this interactive object, learners read how to determine the force created by a hydraulic cylinder during extension and retraction. A brief quiz completes the activity.

Learners view animations showing the operation of the internal parts of an AC generator. A short quiz completes the activity.

In this interactive object, learners identify the risk factors and the precautions to follow when treating a patient with a cardiac condition. They also design a treatment plan for that patient.

In this learning activity you'll review the hexadecimal numbering system.

The two types of digital devices, logic gates and flip-flops, and the types of basic operations they perform are presented.