Help your students master pre-algebra skills before they move on to Algebra 1 and other higher-level math skills that require a full-understanding of algebraic concepts. Pre-Algebra features worksheets that begin with a short instruction or concept followed by problems to work. Concepts covered include number systems, integers, radicals, variables & exponents, factoring, linear equations, graphing, and more. Middle & Upper Grades. 76 classroom-reproducible perforated pages. Line-listed answer key included.