상품명 : Impact SS/TG G4(EM) Regions of the United States
상품명 : Impact Social Studies/TE GK (Teacher's Edition)
상품명 : Impact Social Studies/TE G2 (Teacher's Edition)
상품명 : Impact Social Studies/TE G1 (Teacher's Edition)
상품명 : Impact Social Studies/TE G3 (Teacher's Edition)
상품명 : Impact Social Studies/TE G5 (Teacher's Edition)
상품명 : Impact Social Studies/TE G4 (Teacher's Edition)