In this animated activity, learners explore three major methods of heat transfer and practice identifying each.

In this learning activity you'll examine force, mass, and acceleration to understand this "Law of Acceleration."

In this animated activity, learners examine the two major phases of cell division: mitosis and cytokinesis.

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

In this animated and interactive object, learners examine ventilation, external and internal respiration, and gas transport.

In this learning activity you'll explore a step-by-step process to solve simple free-body diagrams. They identify forces acting in the x or y direction in interactive exercises.

In this interactive object, learners review the major parts of the skeletal system by clicking on the correct term as each bone or joint is highlighted on a skeleton.

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

Students identify the parts of a triple beam balance and practice measuring the mass of objects.

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

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.

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