For you Science teachers, here's a pretty cool Periodic Table.
You've got a couple neat things happening. You can hold your mouse over the metals, nonmetals & state (solid, liquid, gas, etc) sections & it will highlight the appropriate elements. You can also click on any element for a detailed article about that element.
Also, there are tabs at the top for many more display options. (Isotope & property stuff)
Hey, even a former language arts teacher can appreciate this!