Schulverband - federation of schools

http://www.fede.org/en/images/stories/explications_cotisatio...

Here's a description in poorly written English:

Education in Poland

In the field of commercial education two types of schools stand out
definitely — the business school and the commercial school. Both
types are fulfilling a real need by training definite groups of people
for a definite purpose. The business school looks after the interest
of the retail store keeper who conducts his business on a small scale;
the commercial school aims to give vocational training to men and women will prepare themselves for clerical positions in commercial
and banking institutions. The business school is of elementary grade.


The commercial school has a higher standard of organization based
on six years in an elementary or three years in a secondary school.
The course of study lasts three years, exclusive of the preparatory
class attached to the school for candidates insufficiently prepared.

http://www.archive.org/stream/educationinpolan00bachuoft/edu...