Solver You can enter any equation, ask to solve for any variable, and the site will tell you step by step the appropriate steps in solving an equation. For this objective this tool gives you a ridiculous number of steps.
Samples This site includes sample questions exactly as needed for this unit....but is a very basic description.
Practice Sheets Addison Wesley practice sheets and answer key in a .pdf format.
Solver 2 This solver does an excellent job breaking down an equation step by step, not really flashy. Gives results with negative exponents which may confuse the students.
Videos There are a great many video examples to follow...well done, but definitely requires a high speed connection.
Lesson/Quiz This site has a concise lesson and a student quiz.

Math 10 Text - Regina Public

Pages 61 - 63

Math 10 Text - Burt Theissen

Pages 23-25