Two tutorials on the topics of "Growth of group III-nitride materials" and "Point defects" will be offered on Sunday afternoon, August 23rd, 2020. The tutorials will be given by Ferdinand Scholz, University of Ulm (Germany), and Chris van de Walle, University of California at Santa Barbara (USA), respectively. All attendees of IWN 2020 can book this option when registering via the IWN 2020 website.