Kloosterskool (cloister school) is not the proper name, it is more a nickname given to the building by some people in Kroonstad. It refers to the convent school run by the Sisters of Notre Dame. I will come to the details on how, why and when in this article.
To the east of Kroonstad, just outside of town in an area called Jordania is a school complex. This is a school operated by the Sisters of Notre Dames de Namur, short SND.