Sheryl Kish has created this powerpoint for Algebra 1 classes. The textbook used in this class is McDougal Littell's Algebra 1: Concepts and Skills. This powerpoint covers Chapter 1, section 1, called "Variables in Algebra." This section covers definitions of variables, values, variable expressions, discusses how to evaluate expressions, shows examples of evaluating real-life expressions, and ends with evaluating geometric expressions (basic area and perimeter formulas). This powerpoint starts with a "Do Now" or Warm-up, goes through definitions, examples and follows with practice problems for the students to complete. It ends with a sample homework assignment from the textbook used in class.