In this interactive object, learners read the definitions of the parts of a cell and assemble a basic eukaryotic cell in a drag and drop exercise. A matching quiz involving cell terms and their definitions completes the activity.

Learners examine the drawing symbols used for counterbore, countersink, spotface, radius, diameter, and depth. In the quiz that completes the activity, they associate these symbols with machining applications.

Learners read definitions of atomic symbols, atomic numbers, and mass numbers and then answer questions about the number of neutrons, protons, and electrons in select elements.

In this interactive exercise, learners review definitions of 26 terms and then test their knowledge in a matching exercise. Only six terms are included in the quiz; however, if the learner clicks “Restart,” more terms appear in random order.

The student reviews definitions of their/there/they're and completes a practice exercise. The print and email function at the end has been disabled.

Students read a definition of Kirchhoff's Voltage Law and view examples of its use.

Learners read definitions of the terminology associated with algebraic operations and then follow steps to use the fundamental laws of division to simplify algebraic expressions.

The student reviews definitions of it's/its and completes a practice exercise.

In this interactive object, learners review respiratory system terminology and then match the terms with their definitions.

The student reviews definitions of your/you're and completes a practice exercise.

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.

The target audience of this learning object is trigonometry students who have already learned what a radian is and have already derived the key values of the coordinates associated with common radian units, but now need to practice finding those values on the unit circle. The student does not need to know the definition of the six trig functions to do this activity.

Students read different definitions of "acids" and "bases." In an interactive exercise, they identify if a substance is an acid or a base.

The student reviews definitions of then/than and completes a practice exercise.

In this animated and interactive object, learners examine the definitions and formulas for radius, diameter, circumference, and area. Students also solve practice problems involving the circumference and area of a circle.

The student reviews definitions of to/too/two and completes a practice exercise.

The student reviews definitions of effect/affect and completes a practice exercise.

Learners read definitions of the terminology associated with algebraic operations and then follow steps to use the fundamental laws of multiplication to simplify algebraic expressions.

Learners read the definitions of an assumption and a fact. They then provide their own examples of each and compare those to the examples provided.

The student reviews definitions of lose/loose/loss and completes a practice exercise.