Learners view waveforms at various locations of an SCR circuit controlling the intensity a light bulb. The waveforms are shown when the light is dim, at medium brightness, and at full brightness. A brief quiz completes the activity.

This review assesses the student's ability to understand screw threads and fasteners.

This document gives the student a text and graphic overview of screw threads and fasteners.

This project gives a drawing with steps to complete the activity.

In this screencast, you'll observe two vehicles moving across the screen at different rates then describe the motion. Additionally, you'll select the corresponding graphs of distance vs. time, velocity vs. time, and acceleration vs. time for each vehicle.

In this animated activity, learners examine the operation of the SCR, including how it is biased and how it is turned off. A brief quiz completes the object.

In this screencast, learners examine the bones of the appendicular skeleton.

in this screencast, learners examine the formation of radial and concentric fractures as an object breaks a pane of glass.

This screencast, we see how the shape of a stain defines the angle of impact. In general terms the more circular the stain, the more perpendicular will be the angle at which it struck the surface. The more elliptical the shape of the stain, the more acute the angle will be. With practice and experience, the analyst can recognize the general angle of impact based solely on the shape of the stain.

In this screencast, learners examine the function and location of the motor neurons and the damage that can result when they are injured.

This screencast will help the student identify normal blood cells and their functions. This will include the identification of red blood cells, five types of white blood cells, and platelets.

In this screencast, learners read an explanation of the file rules and indexing that have been developed by the Association of Records Managers and Administrators.

In this screencast, people preparing to work in a medical office review the basic steps to follow when taking phone messages.

This document is a visual and text description of using a screw thread micrometer with a lathe.

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

This screencast shows the symbols used to represent the type of pulse required at the clock input to activate flip-flops.

In this screencast, students identify various muscles of the face and scalp and see them in action.

In this learning activity, you'll explore the topic of cross-site scripting, (or XSS)

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 screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.