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 object, learners study the operation of a ladder circuit that controls the rotational direction of a DC motor.

Learners study the operation of a ladder circuit in which coils on one rung control contacts in other rungs.

Learners examine the labeling scheme used in ladder logic diagrams to identify components, wires, rungs, and rails. This activity includes self-check questions.

Learners examine how a ladder logic circuit becomes latched when a normally open pushbutton is momentarily pressed.

Learners read descriptions of the following training and certification levels for organizations using a lean approach to quality: "green belt," "black belt," "master black belt," and "champion."

In this animated object, learners examine the design of a ladder circuit that provides manual control to a water pumping system. Students also study modifications to the circuit as the complexity of the system increases.

This interactive object is designed to help learners memorize the schematic symbols used in ladder logic diagrams. Learners quiz themselves using electronic flashcards.

Learners read about various cuts of beef and the methods of preparing them: roasting, baking, broiling, pan broiling, braising, stewing, and marinating. In a drag-and-drop exercise, students match the cut of beef to the appropriate cooking method.

In this animated learning object, learners view how the fats that people eat are digested and absorbed.

Students read about the different types of diabetes and the treatment methods available.

Students match images of insects and other pests with their descriptions in this lesson on keeping a food service operation free from contamination.

Learners read about the S.O.A.P. and D.A.R. formats that are used to document progress notes in medical records. They then match statements to S.O.A.P. and D.A.R. categories in drag-and-drop exercises.

Students read how to record relevant information on a test tray evaluation form. They enter their own analysis of the data in a practice exercise.

Learners take a close look at the information on product labels concerning fat, fiber, and serving sizes. A quiz follows the lesson.

Learners examine the costs of replacing an employee. Using a formula, students calculate these expenses in practice exercises.

Learners read how to calculate the full-time equivalent for hours worked by employees. Practice exercises complete the activity.

Students read about fresh herb garnishes and match the garnishes to appropriate foods.

In this animated learning object, learners read about the proper handling of foods that contain the nutrients and water that bacteria require for growth.

Students read about foods that are high in nutrients compared to the number of calories. They identify if certain foods have high or low nutrient density.