Learners examine how the National Debt occurs and trace its history from the time of the Revolutionary War through the present.

In this learning activity you'll examine how network address translation works.

In this learning activity you'll discover different communication styles from around the world.

Students locate the enamel, cementum, cementoenamel junction, the anatomic crown, and the root of a tooth in this interactive lesson.

In this interactive object, learners change the amount of money received from tax revenue and the amount spent on federal programs as they calculate how fiscal policy affects the gross domestic product (GDP), unemployment, inflation, the annual deficit, the national debt, and interest on the national debt.

The user completes a fill-in-the-blank exercise to review the anatomy of the heart.

In this interactive learning activity, learners review the terms used to describe relative position of body parts in order to have a common set of words to describe their position. Check out our video on relative position: https://bit.ly/2kTXujp

Students identify the various regions of the human body through drag-and-drop exercises.

In this interactive object, learners examine how hydraulic oil is contaminated, the types of damage contamination can cause, and the methods used to clean the oil.

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

This learning object is designed to assist students in understanding and interpreting collision evidence found in automotive lamps. In particular, the concepts of Hot Shock, Cold Shock, Hot Break, and Cold Break will be visually addressed.

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

The student identifies the anatomical parts of the ear and learns the purpose and function of these parts. A review follows the lesson.

Learners review and reinforce their knowledge of brain anatomy and function in this learning activity.

Thousands of health and beauty products claim to be cruelty free - but do you know how to spot a fake? Test your knowledge and explore the exciting science that's delivering cutting-edge and better alternatives to animal testing in this interactive experience. Make decisions as both a beauty blogger and a research scientist as you navigate animal testing in the health and beauty industry.

In this animated and interactive object, learners view two examples of how to subtract fractions with unlike denominators and then work five similar problems.

In this interactive object, students view the various positions used during medical examinations. They then match the names of the positions with the correct images and with their descriptions.

In this screencast, learners review the parts of the gastrointestinal system and then check their knowledge in a matching exercise.

In this video learners view the valves and chambers of the heart.

In this animated learning object, students read about the backflow of contaminated water and how to prevent it.