Silvano 
Pre-Algebra, Grades 6 — 12 [PDF ebook] 

Make math matter to students in grades 6 and up using Pre-Algebra: Daily Skill Builders! This 96-page book features two short, reproducible activities per page and includes enough lessons for an entire school year. It covers topics such as fractions, mixed numbers, decimals, integers, variable expressions, equations, inequalities, graphing, ratios, proportions, percents, rational and irrational numbers, polynomials, and probability. Activities become more challenging as students build upon what they have learned. The book is perfect for review and practice and supports NCTM standards.