In this interactive object, learners read a description of value-added and non-value-added activities and then place various work duties into these two categories.

The learner views a method to find the total complex power of a circuit in which the individual real and reactive powers are found and then added together. Several examples are shown, along with the power triangles.

In this animated object, learners follow an analogy of water flowing through pipes and valves to see how resistance decreases in a parallel circuit as branches are added.

Students explore the history of U.S. Constitutional amendments and the process involved in adding an amendment. In an interactive exercise, learners author their own amendments and explain why these should be added to the Constitution.

In this animated object, learners follow an analogy of water flowing through pipes and valves to see how current increases in a parallel circuit as branches are added.