Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.

Learners examine how chemists use moles to "count" atoms by weight. Examples are given.

In this interactive lesson, students examine the quantitative relationship between chemicals in a balanced mathematical equation.

Identify the forms of energy through definition and example.

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.

This interactive activity represents the grid modeling technique, a heuristic model for choosing a centralized location for a manufacturing or distribution center within a supply chain network. The formula calculates a central point between the suppliers and the markets. This object requires the latest version of Flash Player.

After a brief review, the student solves five practical shop problems using right angle trigonometry.

In this learning activity you'll practice calculating quadratic equations using the 'completing the square' method.