Abeka’s Grammar high school courses integrate Christian and character-building principles for a holistic perspective on writing and communication. In addition, foundational skills of grammar and composition are taught with an emphasis on developing students' analytical thinking skills, writing skills, research skills, and organization skills. The Grammar IV Teacher Key includes a copy of the student work-text with answers overlaid. A supplemental appendix contains answers to diagramming and writing exercises. Spiral-bound softcover. Grade 10.