Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).

In this interactive object, the learner practices identifying charges on ions.

Learners test their knowledge of how sleep deprivation affects work productivity.

In this interactive and animated object, learners examine orthographic projection and the Glass Box Theory. Front, side, and top view development is demonstrated with pictorial views of each object to help develop 2D to 3D visualization skills.

In this animated object, learners examine three data compare instructions used by programmable logic controllers (PLCs). A practical application to show how these instructions are used in an industrial setting is provided.

Observe disorganization in an office setting and choose solutions to the problems as if playing the board game "Clue."

Learners read how the transfer function for a RL high pass filter is developed. The transfer function is used in Excel to graph the Vout. The circuit is also simulated in Electronic WorkBench, and the resulting Bode plot is compared to the graph from Excel.

Learners read about the S.O.A.P. and D.A.R. formats that are used to document progress notes in medical records. They then match statements to S.O.A.P. and D.A.R. categories in drag-and-drop exercises.

This learning object assesses the learner's ability to recall the names and locations of the parts of a drill press. This assessment includes drill press type identification.

In this screencast you'll identify and write assertive "I" statements that focus on BCF (behavior, consequences, and feelings).

This learning object describes the production of an alternating current in a generator with a single-loop armature. An illustration of how a sine wave is produced is shown through animation.

In this interactive object, learners examine how hydraulic oil is contaminated, the types of damage contamination can cause, and the methods used to clean the oil.

In this animated and interactive object, learners use an algebraic formula to solve a problem involving distance, rate, and time.

In this learning activity you'll calculate the numeric value of an area when given the z scores.

Students view a sample of the keystrokes of a TI-30XIIS calculator that are required to solve for the instantaneous current of a de-energizing circuit.

This etool will provide high school educators, specifically career pathway builders, with an overview of implementing programs of study.

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 learning activity you'll examine how network address translation works.

Learners read and listen to tips for organizing farm-related financial information.

The learner views several animations to study Newton's First Law of Motion, also known as "The Law of Inertia."