In this animated activity, students read about the two general types of variable resistors: potentiometers and rheostats. A brief quiz completes the learning object.

In this animated activity, students are introduced to standard procedures, pilot actions, and pilot callouts for Be76 critical phases of flight including takeoff and initial climb, ILS approach, non-precision approach, visual approach, and aborted takeoff.

Learners read a detailed description of the VAT-40 tester and practice using it in an interactive exercise.

In this animated object, learners read the dimensions of the different types of vehicles typically considered in highway design.