Interactive 3D visualization of tetrahedral chiral centers. Practice assigning Cahn-Ingold-Prelog (CIP) priorities, rotate molecules to place the lowest priority group in the back, and determine R or S configurations.
Interactive 3D simulation of nucleophilic substitution reactions. Compare the concerted backside attack of an SN2 mechanism (inversion) with the stepwise planar carbocation of an SN1 mechanism (racemization).