This workshop was organized in cooperation with the SFB936 by Andreas K. Engel, Christoph S. Herrmann, Guido Nolte, Ileana Hanganu-Opatz, Christian Gerloff, and Sina A. Trautmann-Lengsfeld on October 23rd-25th 2015 at the University Medical Center Hamburg-Eppendorf, Germany. The workshop focused (1) on EEG and MEG data investigated with functional coupling (Pascal Fries, Michael Wibral, Guido Nolte, Arne Ewald), (2) on brain stimulation with tACS in brain networks (Andreas Engel, Christoph Herrmann, Lisa Marshall, Phillip Ruhnau, Tuomas Mutanen) as well as (3) optogenetics in animals (Peter Hegemann, Joachim Ahlbeck). It encompassed lectures by internationally recognized speakers in the mornings, followed by introductory tutorials and hands-on sessions about cutting edge methods of coherence and cross frequency coupling, tACS artefact correction, and optogenetics on both simulated and real data in the afternoon. Furthermore, the workshop offered a unique opportunity to exchange expertise between participants and lecturers as well as ample of opportunities for scientific discussions. An outline of the program can be found here.