Spectrum Reading Comprehension Grade 3 Workbook, Fiction and Nonfiction Passages, Identifying Story Structure and Main Ideas, Critical Thinking Skills, Classroom or Homeschool Curriculum [Spectrum] on Amazon.com. *FREE* shipping on qualifying offers. Spectrum Reading Comprehension Grade 3 Workbook, Fiction and Nonfiction Passages, Identifying Story Structure and Main Ideas, Critical Thinking Skills, Classroom or Homeschool Curriculum