The intercantonal Conference on External School Evaluation incorporates all centres for evaluation services responsible for the external evaluation of compulsory schooling (grades 1 through 9) or its conceptual development in the German-speaking part of Switzerland.  Switzerland is a federally structured state consisting of 26 cantons, all of which have their own system of public schools.  Accordingly, every canton provides its own system of external school evaluation. 

All details are given in the following link and in the sources given there. 

Switzerland Summary Profile, published 3 March 2010 (pdf 96kb)