PBS
Pbs Learning Media: Periodic Table of the Elements
This interactive periodic table developed for Teachers' Domain provides detailed information about the chemical properties of elements and illustrates the electron configurations that determine those characteristics.
Texas Instruments
Texas Instruments: Periodic Law (I)
This activity is designed to assess the comprehension of concepts related to periodic law.
Oklahoma State University
Oklahoma State University: Chem 1215: Periodic Table
Explains different sections of the periodic table, and how they are used.