Purple Math
Purplemath: Solving Radical Equations: Concepts
Provides a thorough lesson on radical equations. Explains what radical equations are and provides many different examples on how to solve different types of radical equations.
Lawrence Hall of Science
The Math Page: Skill in Algebra: Multiplying and Dividing Radicals
Here is a site that clearly and thoroughly explains multiplying and dividing radical expressions. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to...
Mr. Martini's Classroom
Mr. Martini's Classroom: Square Roots
Practice solving square roots by changing the difficulty and assessing knowledge with a quiz.