: [Longman] Vocabulary Mentor Joy 2 (2017 개정판)
: [Scholastic] 100 Words Kids Need to Read by Third Grade
: [Compass] 4000 Essential English Words 1 (2E)
: [Seed Learning] 4500 Key English Words 1
: [Compass] 4000 Essential English Words 2 (2E)
: [Longman] Vocabulary Mentor Joy 3 (2017 개정판)
: [Seed Learning] 4500 Key English Words 2
: [Seed Learning] 1200 Key English Words 3
: [Scholastic] 100 Words Kids Need to Read by Second Grade
: [Longman] Children′s Picture Dictionary Book+CD