Teachers should stress throughout their summary of his work that Mendeleev relied on empirical evidence as he looked for patterns in the properties. His novel approach to the problem of periodicity required imagination and creativity. Also, although he worked alone, Mendeleev acquired much of his evidence from other scientists. When he completed his table, he published his results for review by other scientists. All of these aspects are essential parts of the nature of science. Teachers can add even more interest to the summary by showing videos of the chemical reactions of some elements at appropriate times, available on commercial programs, and also on the Internet.