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 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 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 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.

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

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.

In this activity, you'll learn about the different data types associated with databases.

Datum precedence is a fundamental principle in the design and manufacture of mechanical parts and assemblies.

It refers to the order of importance assigned to different datums, which are specific points, lines, or planes on a part, which are used as references for measurement and geometric tolerances.

In this learning activity you'll test your knowledge of the different types of steel rules as well as how to use and read them correctly.

In this screencast, learners categorize different metabolic activities as catabolic or anabolic and follow a glucose molecule through the processes of glycolysis, aerobic respiration, and fermentation.

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.

Explore the different types of personal protective equipment, which protects you against workplace hazards

Learners examine the different types of lines used on a P&ID diagram and the types of connections they represent. They test their knowledge in a matching exercise.

In this learning activity you'll match the different responsibilities of the federal court system with the appropriate federal court.