In this interactive object, the learner practices identifying charges on ions.

Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).

In this animated object, learners examine the different types of joints and their movements.

In this animated object, students examine the role that the solubility of water plays in various biological functions.

This animated lesson shows how pushing a start or stop button on a ladder circuit causes the cylinder of a hydraulic circuit to extend and retract.

In this interactive object, part 3 in a series, learners follow the steps of the “mathemagician” to examine four numerical curiosities: What’s Special About 1089, Perfect Squares: 1089 and 9801, The Mathematical Significance of 1776, and The Calculator Number Game. The learner will also study six number patterns and look at one remarkable table. Immediate feedback is provided.

The learner will identify the types of motion instructions used for programming a robot.

This learning object is designed to assist students in understanding and interpreting collision evidence found in automotive lamps. In particular, the concepts of Hot Shock, Cold Shock, Hot Break, and Cold Break will be visually addressed.

In this interactive object, learners sort veterinary muscle function medications into categories.

In this interactive and animated object, learners practice testing a diode. They determine if a diode is good, open, or shorted.

Learners examine the psychological and sociological barriers that interfere with clear communication. They select examples of ad hominem fallacy, bandwagon fallacy, emotional appeals, red herrings, irrelevant appeals to authority, suggestibility and conformity, “poisoning the well’, and “shoehorning.” In an interactive exercise, learners identify ways to overcome these barriers.

In this activity, you will work with a list of medical terminology abbreviations and their definitions.

In this learning activity you'll read an explanation of scientific notation and practice expressing numbers smaller than 1 in scientific notation.

Explore Intrusion Detection Systems, what they are, how they're configured, and the types of protection the provide.

In this interactive object, learners examine the structural-functional, social-conflict, and symbolic interaction analyses of religion. A mind map and quiz questions are included.

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

In this screencast you'll define how perception influences your world view and learn the elements of the perception process.

In this learning activity you'll examine how network address translation works.

Students read how to determine the elevation of an alignment or cross section where it crosses the TIN.

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