In this chapter, we explore neutrino-nucleon scattering processes that play a central role in accelerator-based neutrino experiments. In particular, we examine two historically significant models used to simulate charged-current quasi-elastic (CCQE) scattering and single-pion resonance production. First, we employ the Llewellyn Smith differential cross section to simulate the phase space of CCQE neutrino-nucleon scattering events, beginning with the simplifying assumption of a free nucleon at rest. We then introduce a basic extension of this model to account for scattering off nucleons in motion inside nuclei. To address inelastic interactions, we illustrate the use of the Rein-Sehgal model in generating charged-current events involving single-pion resonances. This provides a foundation for understanding some key features of neutrino-nucleon interactions relevant to oscillation experiments at intermediate energies.