이 연구는 2011 특수교육 기본 교육과정에 따라 편찬된 초등학교 국어 및 사회 교과서의 학년군별 어휘 사용빈도 및 품사별 사용빈도를 분석하고, 고빈도 어휘에 대한 지적장애학생의 어휘이해력을 파악하여 교과서 및 교수‧학습자료 개발 시 활용 가능한 학년군별 핵심어휘를 선정하는 데목적이 있다. 연구 결과 1~2학년군 전체 연어휘는 17,102개이고, 개별어휘는 1,783개이며, 고빈도 어휘는 127개로 7,919회 사용되었고, 연어휘의 46.30%를 차지하였다. 1~2학년군 어휘이해력은 최저 1.14부터 최고 2.42 사이로 나타났으며, 76개 어휘가 핵심어휘로 선정되었다. 3~4학년군 전체 연어휘는 23,494개이고, 개별어휘는 2,712개이며, 고빈도 어휘는 164개로 10,010회 사용되었고, 연어휘의 42.60%를 차지하였다. 3~4학년군 어휘 이해력은 최저 1.29부터 최고 2.45 사이로 나타났으며, 104개 어휘가 핵심 어휘로 선정되었다. 5~6학년군 전체 연어휘는 60,302개이고, 개별어휘는 5,148개이며, 고빈도 어휘는 378개로 28,675회 사용되었고, 연어휘의 47.55%를 차지하였다. 5~6학년군 어휘 이해력은 최저 1.23부터 최고 2.30 사이로 나타났으며, 236개 어휘가 핵심어휘로 선정되었다.
The purpose of this study is to analyze frequencies of vocabulary usages and part of speech usages from Korean Language textbooks and Social Study textbooks which are published based on 2011 Special Education Basic Curriculum. Through this analysis comprehension of students with intellectual disabilities on high-frequency vocabularies are analyzed, and core vocabularies by grade that are usable when developing textbooks and teaching materials are selected. As a result, total number of vocabularies per year for students in 1st and 2nd grade is 17,102 and total number of individual vocabularies was 1,783. 127 high-frequency vocabularies were used 7,919 times and these vocabularies are 46.30% of total number of vocabularies per year. Comprehension of vocabularies of students with intellectual disabilities in 1st and 2nd grade is from 1.14 to 2.42 and 76 core vocabularies were selected. Total number of vocabularies per year for students in 3rd and 4th grade was 23,494 and total number of individual vocabularies was 2,712. 164 high-frequency vocabularies were used 10,010 times and these vocabularies are 42.60% of total number of vocabularies per year. Comprehension of vocabularies of students with intellectual disabilities in 3rd and 4th grade is from 1.29 to 2.45 and 104 core vocabularies were selected. Total number of vocabularies per year for students in 5th and 6th grade was 60,302 and total number of individual vocabularies was 5,148. 378 high-frequency vocabularies were used 28,675 times and these vocabularies are 47.55% of total number of vocabularies per year. Comprehension of vocabularies of students with intellectual disabilities in 5th and 6th grade is from 1.23 to 2.30 and 236 core vocabularies were selected.
