Learners click on the root word of a medical term in the left-hand column and drag it to its definition in the right-hand column. There is a time limit, so students will need to train themselves to recognize these root words quickly. Students may repeat the activity as often as they wish. A total of 74 terms are given in random order.

Learners view the steps for determining the square root of a complex number in Excel.

Students read step-by-step instructions for determining the square root of a number using the TI-86 calculator.

Learners follow step-by-step instructions for calculating the square root of a number using the TI-83 Plus scientific calculator. Steps for determining impedance are also shown.

In this learning activity you'll explore how finding and understanding the root cause of stressors can help reduce stress in your life.

The learner will understand how to use a cause and effect diagram to find the root cause of a problem.

In this interactive object, the learner examines the causes, symptoms, and risk factors associated with a stroke. The terms "thrombus," "emboli," and "hemorrhage" are defined. A self-assessment of risk factors completes the activity.

In this interactive and animated object, learners examine open and closed head injuries and the common causes and symptoms related to them.

Students identify the enamel, cementum, cementoenamel junction, clinical crown, clinical root, and epithelial attachment of a tooth.

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

Learners examine the factors that contribute to hip fractures including osteoarthritis, osteoporosis, and osteomalacia.

Students read about the three categories of interest groups: Economic, grass roots and community-based, and civil and constitutional rights.

In this learning activity you'll simplify square roots involving the product of a numeric and variable term.

The learner will explore the techniques used to identify cause-and-effect relationships of a particular problem.

In this animated object, learners examine the causes of air leaks and read how to repair them. The object includes audio.

In this animated object, learners examine how the way in which a rheostat is connected in series with other resistors causes current and voltage to change as the resistance is varied.

In this animated and interactive object, learners study how a DC circuit, consisting of a diac, a capacitor, and two resistors, causes a light-emitting diode to turn on and off. A brief quiz completes the activity.

This animated lesson shows how a photoelectric sensor, connected to a ladder circuit, causes the cylinder of a hydraulic circuit to extend and retract.

In this animated activity, learners see that changing the resistance value of the load in the secondary of a transformer causes current to vary in the primary.

Learners complete two exercises. In the first quiz, they divide viruses into two categories: RNA and DNA. They later match each virus with the disease it causes.