The Center for International Student Assessment (ZIB) is a scientific research institute. Its main mission is international comparative educational monitoring and it conducts the PISA study for Germany every three years. Study programs with a connection to PISA – both in terms of content and methodology – also fall under the responsibility of the ZIB. In addition, the ZIB institute performs meta-analyses on relevant education topics. It is affiliated with the Technical University of Munich and the TUM School of Education and is funded by the German government and the federal states.
For more information, see the webiste of the ZIB