This is the 4966th most frequent Polish word.
podstawówka
"Podstawówka" means "primary school" or "elementary school" in English.
Here, "podstawówki" is used in the genitive singular form to indicate the location related to the action of attending.
Moja siostra chodzi do podstawówki.
My sister goes to elementary school.
"Podstawówce" is used in the locative singular form to specify the place where an action occurred.
W podstawówce nauczyłem się podstaw matematyki.
In elementary school, I learned the basics of mathematics.
"Podstawówka" is used in the nominative singular form as the subject of the sentence.