Volume 7 of the series "Religionspädagogische Bildungsforschung" published by Burkard Porzelt and Werner H. Ritter at Klinkhardt-Verlag has just been published, an empirical study by Rudolf Englert's research group in Essen that examines the quality of real religious education.
The abbreviation R-A-D-E-V, which gives the study its title, describes five factors that make up such quality, namely relevance (R), level of ambition (A), dramaturgy (D), expertise (E) and networking (V)