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http://www.purplemath.com/index.htm

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• Purplemath
  
  Purplemath contains practical algebra lessons demonstrating useful techniques and pointing out common errors. Lessons are written with the struggling student in mind, and stress the practicalites over the technicalities. Links and other resources also available.
  algebra equation function graph guideline help homework lesson linear polynomial problem purplemath quadratic
  By janwigh in Matematik with matematik purplemath
• Purplemath
  Purplemath's algebra lessons are written with the student in mind. These lessons emphasize the practicalities rather than the technicalities, demonstrating dependable techniques, warning of likely "trick" questions, and pointing out common mistakes. The lessons are cross-referenced to help you find related material. Additional practice resources available.
  Purplemath contains practical algebra lessons demonstrating useful techniques and pointing out common errors. Lessons are written with the struggling student in mind, and stress the practicalites over the technicalities. Links and other resources also available.
  algebra equation function graph guideline help homework lesson linear polynomial problem purplemath quadratic
  By lfriedrich in Teacher Resources with system:unfiled

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