PBS
Pbs: Equivalent Expressions Using Exponents
Apply your critical thinking skills to learn about multiplication and division of exponents. This interactive exercise focuses on positive and negative exponents and combining exponents in an effort to get you to recognize patterns and...
Lawrence Hall of Science
The Math Page: Skill in Algebra: Rational Exponents
Here is a site that clearly and thoroughly explains rational exponents. There are example problems with solutions and problems for students to try. Answers to each student problem is hidden until one passes over it with the computer's...