In this screencast, students read about the basic organization and structure of the periodic table of elements. Students identify elements as belonging to a group, a period, or neither.

In this learning activity you'll practice using the 4-input truth table.

Students practice identifying common elements from the periodic table by name or symbol.

Instructions on how to use and construct a truth table for digital devices are provided.

In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.

In this learning activity you'll review the operation of a NOR gate by using a truth table, a Boolean Algebra equation, a switch analogy, and a written statement.

In this learning activity you'll describe the operation of an AND gate by using a truth table, a waveform diagram, a Boolean Algebra equation, a switch analogy, and a written definition.

In this learning activity you'll review how an OR gate operates using a truth table, a Boolean Algebra equation, a switch analogy, and a written statement.

In this learning activity you'll describe the operation of a logic inverter using a truth table, a Boolean Algebra equation, a switch analogy, and a written statement.

In this learning activity you'll explore the operation of a NAND gate using a truth table, a Boolean Algebra equation, a switch analogy, and a written statement.

Learners examine a 555 integrated circuit, which functions as a one-shot monostable multivibrator, and then test their knowledge. Immediate feedback is provided. Animations are used to show the sequential operations.

Learners watch a video and an animated depiction of the operation of the feed section of a corrugated press. They also read descriptions of the feed table, side guides, feed wheels, feed gates, and the feed roll.

Learners examine a table of common polyatomic ions. Eight examples are provided for practice.

In this learning activity you'll discover how the visual perception concept influences your understanding of unstable figures.

In this learning activity you'll identify acceptable paraphrases of source material.

In this animated learning object, students read about the backflow of contaminated water and how to prevent it.

In this learning activity you'll review the operation of an Exclusive-NOR gate by using a truth table, a Boolean Algebra equation, a switch analogy, and a written statement.

In this animated object, learners examine the chemistry behind table salt.

In this learning activity you'll discover how the visual perception concept influences your understanding of unstable figures.

In this learning activity you'll discover how the visual perception concept influences your understanding of unstable figures.