In this animated learning object, students view the operation of an oscilloscope that is used to measure AC voltages. A brief quiz completes the activity.

Learners analyze a base-biased npn transistor circuit. A "help" screen is available.

Learners study the method of using more than one track and quadrature modes to improve the resolution of an optical encoder. A brief quiz completes the activity.

In this animated object, learners examine the proper way to reset a counter instruction in a programmable controller.

Students read the rules used in multiplying and dividing signed numbers. They view examples and work practice problems.

Students read how to organize their work when multiplying more than two signed numbers. A review and practice problems complete the activity.

Learners follow the steps for adding and subtracting signed numbers and complete practice exercises.

Learners read the definitions of working capital, current ratio, quick ratio, return on equity, accounts receivable turnover, and inventory turnover.

Learners work problems to make conversions between RMS, average, peak, and peak-to-peak AC voltages.

Calculate values in parallel circuit

Identify the missing number in these equations.

Match the math vocabulary with the correct definition.

Practicing numbers in Spanish