In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.

Learners examine the structure and function of skin including the production of melanin.

In this animated object, learners are introduced to the structure and function of animal cell organelles.

In this learning activity you'll study the structure of the cell membrane and construct it using the correct molecules.

In this animated and interactive object, learners identify the valves and chambers of the heart.

Understand the pseudocode structure of variable declarations

Identify the correct description of pseudocode if statements.

Explore repetition structures, which are commonly referred to as “Looping” statements, are a vital component of programming computer and industrial applications.

Explore repetition structures, which are commonly referred to as “Looping” statements, are a vital component of programming computer and industrial applications.

Understand pseudocode structure of Inputs and Outputs, a vital component of programming computer and industrial applications.

Understand the pseudocode structure of variable declarations, a vital component of programming computer and industrial applications.

Explore the location, structure, and function of the juxtaglomerular (JG) apparatus.

In this animated activity, learners practice listening and counting the apical pulse of adults, children, and infants.

Learners view a mind map of the social-conflict Approaches and answer questions about the inequalities, competition, and power found in social structures.

In this screencast, learners examine the internal structure of an unloading valve. This learning object includes a video clip demonstrating the use of an unloading valve in a metal stamping application.

Students examine atomic structure and the octet rule.

In this interactive object, learners examine the neuron pathway into and out of the spinal cord. They complete the activity by testing their knowledge of vocabulary and the location of spinal cord structures.

In this animated object, learners view the "T" and "P" waves and the "QRS complex." A brief quiz completes the activity.

In this screencast, learners examine the properties of the peptide bond and how the bond relates to the structure of hair.

In this colorful and interactive object, learners examine the structure and function of muscle and connective tissues. A quiz completes the activity.