Learners examine the internal parts of a DC electrical motor and then text their knowledge in a drag-and-drop exercise.

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

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

This review tests the student's knowledge of lathe construction.

In this learning activity you'll explore a Tool and Cutter Grinding machine and its components.

This review assesses the student's knowledge of the tool and cutter grinder and of the tool and cutter grinding process.

In this screencast, learners examine the construction of a 7493 IC as mod-2 and mod-8 up-counters. They view how this binary counter can be modified to operate at different modulus counts.

In this interactive object, learners read the definitions of terms associated with the construction of a grouped frequency distribution. A brief quiz completes the activity.

In this animated activity, learners examine the construction of a binary counter using a JK flip-flop. The ability of the JK flip-flop to "toggle" Q is also viewed.

In this learning activity you'll explore the physical construction and operation of single-mode and multi-mode fiber-optic cables used in networking.