School
noun
A study school is obviously a place where people study and learn. In English, that's simply a school.
がっこう
This jukugo word consists of on'yomi readings, except 学 (がく) is shortened with a small っ to make it がっこう.
平日は学校に行きます。
I go to school on weekdays.
レイチェルは私の学校の友人です。
Rachel is a friend from my school.
私の学校は、三年生のクラスが四組あります。
In my school, there are four class groups for third graders.