This Oxford University website offers new Macromedia Flash Player interactive tutorials to assist students with organic chemistry reactions. After a brief summary of nucleophilic substitutions and eliminations involving one and two components in the rate determining step, students can learn about the reactions through a series of problems with useful guidelines. After an individual finishes the problem, the site checks the answer and, for incorrect answers, it provides the correct solution. Users can find an additional 10-question quiz about substitution and, the site promises, in the near future quizzes dealing with elimination and a combination of topics.