Lattice Calculations of Hadronic Scattering

While lattice QCD is able to compute single-hadron properties to few-percent accuracy, only very recently has it become possible to extract precise information about the interactions between hadrons. I will review the methodology for extracting phase shifts from lattice correlation functions in a finite volume, and I will discuss recent progress in computing a variety of hadron-hadron scattering amplitudes using lattice QCD, including recent efforts to learn about the simplest nuclear systems.