Accelerated Christian Education (ACE) curriculum has Scripture as its foundation, fully integrating biblical principles, wisdom, and character-building concepts into education. Students move at their own speed through the self-instructional 'PACE' workbooks. Following the mastery approach, PACEs are formatted for students to complete the exercises found throughout the workbook, take a practice 'self test,' and conclude with a 'final test' (removed from the center) to measure understanding. This 9th grade Pace & Key Comprehensive Kit includes both the PACE workbooks as well as the accompanying PACE SCORE Key answer booklets. This ninth grade kit contains the following PACE sets: Grade 9 Algebra 1 PACEs 1097-1108 Grade 9 Algebra 1 SCORE Keys 1097-1108 Grade 9 English PACEs 1097-1108 Grade 9 English SCORE Keys 1097-1108 Grade 9 World Geography PACEs 1097-1108 Grade 9 World Geography SCORE Keys 1097-1108 Grade 9 Biology PACEs 1097-1108 Grade 9 Biology SCORE Keys 1097-1108 Grade 9 Etymology (Word Building) PACEs 1097-1108 Grade 9 Etymology (Word Building) SCORE Keys 1097-1108 Two books are required to complete this curriculum (both sold-separately): The Swiss Family Robinson and Twice Freed. ACE Comprehensive Curriculum (5 Subjects), Single Student Complete PACE & Score Keys Kit, Grade 9, 3rd Edition (with 4th Edition World Geography & Biology)