The NOvA Experiment is a long baseline neutrino oscillation experiment with the Far Detector in Ash River, Minnesota, USA, and utilizing Fermilab's NuMI beam line. A key component of the success of the experiment is understand the detector's response to charged particles. In support of that, NOvA has constructed and run a Test Beam experiment at the Fermilab Test Beam facility. The NOvA Test Beam has been collecting data with a scaled-down NOvA detector and new tertiary charged-particle beamline deployed at Fermilab since January 2020, and is expected to continue running until July 2022. The tagged particle samples collected already include several thousand protons, pions, and electrons ranging in energy from 0.4 GeV to 1.5 GeV. In addition to measurements meant to reduce detector response uncertainties, these data will be used to carry out dedicated measurements of proton and pion scattering in the detector to improve modeling of the final state of neutrino interactions, including dedicated studies of pion rescattering. This poster will present the current status of analysis of proton, pion and electron response in the Test Beam Detector.