Learners watch a brief video clip. They then follow step-by-step instructions on how to do a urine colony count and examine the criteria for determining if a colony count represents an infection. A brief quiz completes the object.

In this interactive object, learners read how to use the indefinite articles "a" and "an" with singular count nouns. They omit these articles with noncount and plural nouns. The students then practice using "a" and "an" correctly.

Students locate the countries of the Middle East on a map in this interactive exercise.

Learners view an animation of a counterbalance valve in operation and examine the valve’s internal structure.

Learners study how a DC motor generates counterelectromotive force. A short quiz completes the object.

In this interactive lesson, learners study examples of nouns that can be counted and nouns that cannot. They then identify whether a word is a "count" or a "noncount" noun in a practice exercise.

Learners observe how to cascade PLC counters to extend the maximum count of one counter.

Learners study an animated PLC counting operation and examine how the count is automatically reset.

The technique for designing a MOD 10 counter is introduced. Asynchronous inputs of a JK flip-flop are used to clear the counter.

Learners examine the two methods used by programmable logic controllers to perform a counting operation using addition or counter instructions. A brief quiz completes the activity.

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

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.

Learners examine the counter-reset function of a programmable controller and how it is used.

Learners read an explanation of the debits and credits of accounting as they relate to T accounts and the accounting equation. Illustrated examples are provided.

In this animated object, learners examine how PLC up/down-counters are used to control an automated parking lot gate.

Learners examine a bank statement and a reconciliation form and study how to balance a checking account.

Learners read about the internal and external users of financial information and the kinds of information most often requested.

Learners examine the 10 steps of the accounting cycle. The cycle begins with the analysis of source documents and ends with the post-closing trial balance and interpreting the financial information.

Learners examine the drawing symbols used for counterbore, countersink, spotface, radius, diameter, and depth. In the quiz that completes the activity, they associate these symbols with machining applications.