In this screencast, learners examine the bones of the appendicular skeleton.

In this screencast, learners examine the kinds of physical and chemical changes that occur in substances.

In this screencast, learners examine hearing and balance. Detailed drawings of the outer, middle, and inner ear structures are included.

In this screencast, learners review and reinforce their knowledge of brain anatomy and function.

In this screencast, you will learn about the 24 time zones.

In this screencast we are introduced to the lab equipment used to contain and dispense chemicals.

In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.

In this animated activity, learners examine how organs are visualized in three dimensions. The terms “longitudinal,” “cross,” “transverse,” “horizontal,” and “sagittal” are defined. Students test their knowledge of the location of abdominal pelvic cavity organs in two drag-and-drop exercises.

Learners read about lab equipment and basic safety measures. In a quiz, they view photos and determine if the lab technicians pictured are using safe practices.

In this animated and interactive object, learners examine the properties of liquids, solids, and gases.

Learners view an explanation of how to read a graduated cylinder by measuring the lowest portion of the meniscus. A quiz completes the activity.

In this animated and interactive object, learners examine ABO blood antigens and Rh antigens and their compatibility.

In this animated and interactive object, learners examine the structure and functions of granulocytes and agranulocytes. Two exercises complete the activity.

In this interactive object, learners identify a person's regional body parts.

In this learning activity you'll review the six different ways in which electricity is produced: chemical, friction, heat, light, magnetism, and pressure.

In this animated object, learners examine the different types of joints and their movements.

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.

In this learning activity you'll review how every protein molecule of an organism is synthesized by that organism in a prescribed process. This activity helps students understand the fundamental life process of making protein.

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

In this interactive object, learners identify a person's regional body parts.

In this animated activity, learners examine how organs are visualized in three dimensions. The terms “longitudinal,” “cross,” “transverse,” “horizontal,” and “sagittal” are defined. Students test their knowledge of the location of abdominal pelvic cavity organs in two drag-and-drop exercises.

In this animated and interactive object, learners follow two rules to write unit conversion fractions.

In this learning activity you'll review the six different ways in which electricity is produced: chemical, friction, heat, light, magnetism, and pressure.

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

In this animated object, learners examine the different types of joints and their movements.