In this interactive object, learners review descriptions of various blood collection tube additives. They then test their knowledge by matching the different tubes to their corresponding additives.

Learners read about five different fractures of the hip and the treatments used.

In this animated object, learners compare the mode of action of steroids with the action of amino acid-based hormones.

Learners read how microbes in such items as yogurt, bread, insulin, and insect sprays improve our lives.

In this animated object, learners read about hydrostatic pressure and observe how it is used to measure the level of a material in a container.

In this interactive object, learners view various components of gears and read descriptions of them. Learners then identify the location of each of these components in a drag-and-drop exercise.

Learners apply the principles associated with Boyle’s Law. A brief quiz completes the activity.

In this animated activity, users examine the causes of malfunctions in a hydraulic pressure-reducing valve and the problems that result. A short quiz completes the learning object.

Learners compare the three scales used in pressure measurements: gage, absolute, and vacuum. A brief quiz completes the activity.

How well do you know your air brake parts?

Transportation Vocabulary

Practice the passive voice.

Identify the tenses of the verbs in the sentences shown.