This is the 7420th most frequent Korean word.
초등
"초등" means "elementary."
In this sentence, '초등' is used as part of the word '초등학교,' which means 'elementary school.' '초등' refers to the 'elementary' level in the educational system.
초등학교에 다니는 학생들은 일반적으로 아주 활발합니다.
Elementary school students are generally very active.
In this sentence, '초등' describes the level of math problems, implying they are suitable for elementary school students or of elementary difficulty level.
초등 수준의 수학 문제를 풀어보겠습니다.
Let's solve math problems at an elementary level.
Here, '초등' is used to specify the kind of teacher, namely a teacher who teaches at the elementary school level.