Prof. Jim Smith's Ultrafine Aerosol Group hosted an AirUCI workshop on Aerosol Dynamics, taught by Prof. Pete McMurry of the University of Minnesota. The workshop took place December 12-14, 2018 at the James San Jacinto Mountains Reserve near Idyllwild, California. During the workshop the group learned how to use a sectional code for calculating the time-dependent evolution of an aerosol particle size distribution. It was a lot of fun and we hope to have a chance to organize additional workshops in the future!