Essentials for Algebra Teacher's Guide Author:Siegfried Engelmann, Bernadette Kelly, Owen Engelmann Soft cover SRA Essentials for Algebra Teacher's Guide, ISBN# 0-07-602196-3). Contains teacher's guidance and directions, and answers (in blue). Concepts taught are: Prerequistie Concepts, Language of Algebra, Integers, Addition and Subtraction Equations, Multiplication and Division Equqations, Proportional Reasoning and Probability, Functions an... more »d Graphs, Linear Equations, Powers and Roots, and Polynomials.« less