Teaching May/June 2023: Lecturer on Open and FAIR Science at the Cargèse school The Transient Universe 2023. May/June 2016: Educator at the second Massive Open Onlince Course on Gravity May 2016: Lecture on AGN at the Cargèse school on Astrophysical jets. November/December 2015: Educator at the Massive Open Onlince Course on Gravity May 2013: Lecture on AGN at the Cargèse school on Cosmic Accelerators. March 2012: On-line lecture "Active Galactic Nuclei: the known and the unknown". December 2007: Guest lecture at the Observatoire de Genève: Advection Dominated Accretion Flows (PDF file, 22 MByte) December 2006: Popular talk on "The Violent Universe - NASA's high energy missions" Fall 2006: Extragalactic Astronomy and Cosmology (PHYS 316) at the University of Maryland Baltimore County Fall 2004: Stellar Astrophysics (PHYS 205) at the University of Maryland Baltimore County