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. Grade 10’s Grammar IV Supplementary Exercises workbook contains extra grammar exercises and is an optional textbook for students who need remedial review of concepts. Grammar IV Supplementary Teacher Key sold separately. Softcover. Grade 10.