Introduction to Nambu Jona-Lasinio models of hadrons

These are introductory lectures to the Nambu Jona-Lasinio model with scalar interactions. It is applied to quark models of mesons and baryons. A critical survey is made of regularization methods. The collective rotation of solitons is briefly summarized.Lecture given at the 8th Summer School on Intermediate Energy Physics: Hadron Dynamics at Low and Intermediate Energies, Prague, July 10–14, 1995.