Complex sentence: It is a part of elementary school, a school providing instruction for young pupils, comprising traditionally of grades K-6,in Some school districts, Fourth Grade is the First year of intermediate school or the last year of elementary.
Split into simpler sentences: It is a part of elementary school, a school providing instruction for young pupils, comprising traditionally of grades K-6. In some school districts, Fourth Grade is the first year of intermediate school or the last year of elementary.