This learning object demonstrates the process by which antigens are identified, processed, and presented to mediators of the cellular immune system.

Learners consider the Apgar scores for several fictitious newborns. They are then given an Apgar score and proceed to create a situation in which a newborn would receive that rating.

Students read about the importance of the Apgar score in assessing the newborn after delivery. Each sign of the Apgar score is identified with illustrations to help the student recognize the proper rating.

Learners read an explanation of the concept of apparent power in a power distribution system involving motors, generators, and transformers. A quiz completes this interactive lesson.

In this animated lesson, learners examine the rectifier circuitry in a DC variable speed drive that supplies the voltages to the field coil and armature.

In this animated object, learners study the rotation of the magnetic stator field of an AC motor and how it interacts with the armature to cause rotation. A short quiz completes the activity.

In this animated activity, learners study how the magnetic field of an armature can distort the DC motor's main magnetic field. A brief quiz completes the object.

In this animated activity, learners study how the magnetic field of an armature can distort the DC motor's main magnetic field. A brief quiz completes the object.

In this animated object, students examine the steps for wiring an electrical circuit from reading a schematic diagram.

In this highly interactive and animated object, learners complete three exercises to identify the cranial nerves and their functions.

Learners play a game to review concepts connected with student assessment. The categories on the game board are "General Assessment," "Science Assessment," "Math Assessment," and "Famous Scientists."

In this learning activity, we’ll explore how async and await is used in mobile programming to allow multiple tasks to happen at once.

Students read a description of audiograms. They review audiograms representing various degrees and types of hearing loss.

Learners read about audiological tests including pure tone testing, air conduction, bone conduction, Speech Reception Threshold, and Speech Discrimination Score. They listen to sounds and words recorded at different decibel levels and see a graphic representation of decibel ranges. A brief review concludes the activity.

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

Learners study an animated PLC counting operation and examine how the count is automatically reset.

In this animated object, learners examine the relationship between pressure and temperature in an air conditioning system.

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.

In this animated activity, students view a step-by-step approach for how to connect an ammeter to a circuit. A brief quiz concludes the lesson.

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

Students read a definition of Kirchhoff's Voltage Law and view examples of its use.

Learners examine the relationship of voltage, current, and resistance as it applies to vehicle electrical systems.

In this animated lesson, students view the operation of an electromechanical relay. A brief quiz concludes the activity.

In this animated activity, students read about the two general types of variable resistors: potentiometers and rheostats. A brief quiz completes the learning object.

In this learning activity, learners will learn to calculate the average voltage produced by half-wave and full-wave rectifiers.