2021 REU Posters are available at the links below: Alexis Lupo: Building Gamma-Ray Detectors for Two CubeSats Ayla Weitz: Characterizing the Time Evolution of Free-Energy Proxies to Forecast West Limb Flares, CMEs, and SEPs Ben Zigament: Studying Solar Active-Region Magnetic Evolution Leading to a Confined Eruption Hind Zeitohn: Fast Gamma-Ray Variability in Solar Flares Ilana Doran: Birth and Evolution of Jet-Base-Topology Solar Magnetic Field with Four Consecutive Major Flare Explosions Lucy Wilkerson: Characterizing Steady and Bursty Coronal Heating of a Solar Active Region Reese Williams: Optimizing a Machine Learning Algorithim for Development of Future Instrumentation Santiago Rodriguez: Investigation of Superdiffusive Energetic Particle Transport Ahead of Traveling Shocks Syed Raza: Constraining CME Models Using STEREO Data for Space Weather Predictions Tiger Du: Mysteries at the Frontier: Deconvolving the Energetic Particle Rates of the Voyager Spacecraft