In this animated object, learners see how a time proportioning operational amplifier varies an average DC voltage. A brief quiz completes the activity.

Test your skills at reading a ruler.

Learners view video clips demonstrating Gram's staining procedure. Correctly stained slides are shown.

This interactive learning object demonstrates how the moisture content is determined for a given sample of soil or aggregate.

Learners view video clips demonstrating acid-fast staining procedures. Correctly stained slides are shown. The learning object includes two matching exercises.

Learners read an introduction to arterial blood gasses and then identify uncompensated ABGs.

Learners use this interactive and animated object to examine the use of binary numbers in a programmable logic controller. A brief quiz completes the activity.

In this learning activity you'll review various types of common components used in electronics and view their schematic diagram symbols.

In this learning activity you'll observe how computers operate in a client-server network operating system and consider the advantages and disadvantages of such a system.

This learning object has been created to educate workers about the occupational risks of being exposed to bloodborne pathogens as described in the U.S. Occupational Safety and Health Administration (OSHA) 29 CFR 1910.1030- Bloodborne Pathogen Standard.

Learners study an animation of a spring-and diaphragm actuator controlling the opening of a flow valve.

In this learning activity you'll evaluate the immune response including active, passive, natural, and artificial immunity.

In this interactive object, learners read the characteristics of each stage of labor and delivery. They then identify the stages in a multiple-choice assessment.

In this interactive object, learners read an overview of records management and then classify records as "vital," "important," "useful," or "nonessential" in a drag-and-drop exercise.

The learner will understand how to view an object for interpretation in the standard orthographic format and then accurately sketch three orthographic views using 3rd angle projection.

In this learning activity you'll calculate sine bar problems.

In this learning activity you'll examine how a sine bar is used to measure angles.

In this animated and interactive object, learners identify musculoskeletal fractures.

The learner studies how electrons travel from one atom to the next. Examples demonstrate how voltage is created by the use of a battery or through magnetism. A quiz completes the activity.

In this animated activity, learners view the seven steps that are used to calculate voltage and current values throughout a common-emitter transistor amplifier.

In this screencast, learners read about the parts of the eye.

In this screencast, learners examine the concept of gear ratios. The number of teeth, diameters, and velocity relationships are discussed and calculated using linear ratio equations.

In this learning activity you'll identify abbreviations that represent quantities associated with electrical circuits.

In this animated activity, a drill-and-clamp machine is used to show an application of a pressure-reducing valve. Recommendations on how to properly make pressure adjustments are also provided.

Students take a 13-question quiz to practice reading 25- and 50-division Vernier height gages.