Reinforce your seventh-grader’s math skills with Spectrum Math。 With the progressive lessons in this workbook， students will strengthen skills that include using ratios and proportions， operations with rational numbers， algebra， geometry， and statistics。 The best-selling Spectrum（R） Math workbook series provides quality educational activities that build the skills your child needs for math achievement and success。 Students in grades K–8 will find lessons and exercises that help them progress through increasingly difficult subject matter。 Chapter pretests and posttests， Mid-Tests， and Final Tests help students track their progress and locate areas for improvement。 Aligned to current state standards， Spectrum is your child’s path to math mastery。