OMNeT++ and the INET Framework are used in teaching at various universities.
Courses:
Wireless Network Security, Wireless Network and System Security Group, Carnegie Mellon University (Silicon Valley Campus), 2014 (course, slides1, slides2)
Simulation and Evaluation of Computer Networks (SECoN), TU Darmstadt, Germany, 2014 (course, slides)
Vehicular Networks (C2X), Computer and Communication Systems Group, University of Innsbruck, Austria, 2013 (course, slides, lab)
Methods and Tools for Network Systems, Aalto University, Finland, 2014 (course, slides)
Mobile and Wireless Networks, GRC, Universitat Politècnica de València, Spain, 2013 (course, lab1, lab2, lab3)
Performance Evaluation, University of Pisa, Italy, 2014 (course, slides1, lab1, slides2, lab2)
Other materials:
Tufts Wireless Laboratory, Tufts University, MA (slides1, slides2)
Internet Research Lab, Brigham Young University, UT (tutorial, lab)
Christian Timmerer, Multimedia Communication Group, Alpen-Adria-Universität Klagenfurt, Austria, 2014. (slides)
Middleware course, University of Luxembourg, Luxembourg, 2008 (lab)
INET Framework