Directed Reading Workbook: Holt McDougal Earth Science Directed Reading Workbook Holt McDougal Earth Science With an emphasis on inquiry, Holt McDougal Earth Science provides students with opportunities to observe and apply the scientific processes for Earth science mastery. Grades: 9-12 Material Type: Resource Materials Format: Softcover, 528 Pages ISBN-13/EAN: 9780554016207 ISBN-10: 0554016206 Product Code: 1084343 National/State: National Copyright Year: 2010