In this learning activity you'll test your knowledge of global rates for births.

Students examine how voting rates are determined and how those rates change depending upon the population being studied. A brief quiz completes the activity.

In this learning activity you'll calculate exchange rates to determine the impact of prices of exports and imports.

In this learning activity you'll test your knowledge of global rates for marriage.

In this animated object, learners examine the circuit configuration and operation of a differentiator operational amplifier. A brief quiz completes the activity.

In this learning activity, you’ll identify information hackers use to gain access to a company, explain different types of social engineering attacks, and recognize different solutions to avoid these attacks.

In this animated object, learners study the operation of a linear voltage differential transformer. A brief quiz completes the activity.

In part 2 of this series, learners follow the steps of the “mathemagician” to examine these numerical curiosities: The 189 Challenge; An Armstrong Number: What’s Special About 153? Is 495 Different or Indifferent? Is 6174 Different or Indifferent? It is always 618, and Beginning and Ending the Same.

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.

Through the use of symbols and words, the learner reviews the etiologies, symptoms, and treatment of respiratory and metabolic acid-base disturbances.

In this learning activity you'll test your knowledge of global rates for life expectancy, marriage, divorce, and births.

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

Learners examine how air-to-open valves and air-to-close valves are used in different situations. A brief quiz completes the activity.

The learner reads directions for finding the slope, intercept, and correlation coefficient for a group of ordered pairs using one of eight different scientific calculators.

In this document you'll review photos of different types of drilling tools.

This learning object presents the seven continents and four oceans. Three different world maps are provided.

By the end of this learning activity, you’ll know how to understand, use, and maintain different types of fire extinguishers.

Students read about the different kinds of civil/constitutional rights interest groups and answer multiple-choice questions.

Learners follow steps to add fractions with different denominators. They also review fraction concepts, do a drag-and-drop exercise involving fraction terms, and add fractions with common denominators.

In this learning activity you'll review angles and different types of angular measuring tools associated with manufacturing.