Login Page = Duplicate content?

[QuickLearnTraining]

I am having a problem with duplicate content with my log in page

QuickLearn Online Anytime - Log-in
http://www.quicklearn.com/maven/login.aspx
QuickLearn Online Anytime - Log-in
http://www.quicklearn.com/maven/login.aspx?ReturnUrl=/maven/purchase.aspx?id=BAM-SP
QuickLearn Online Anytime - Log-in
http://www.quicklearn.com/maven/login.aspx?ReturnUrl=/maven/purchase.aspx?id=BRE-SP
QuickLearn Online Anytime - Log-in
http://www.quicklearn.com/maven/login.aspx?ReturnUrl=/maven/purchase.aspx?id=BTAF
QuickLearn Online Anytime - Log-in
http://www.quicklearn.com/maven/login.aspx?ReturnUrl=/maven/purchase.aspx?id=BTDF

What is the best way to handle it? Add a couple sentences to each page to make it unique? Use a rel canonical, or a no index no follow or something completely different?

Your help is greatly appreciated!

[SimonCullum]

Hi Monique, well done, you already know the answer Use a Canonical Tag for all the duplicate pages, to point back to your main login page http://www.quicklearn.com/maven/login.aspx (adding a couple of unique sentences may not make the pages unique enough to not be classed as duplicate, as duplicate includes very similar pages). Regards, Simon ~ (PS. sorry for the lack of paragraphing here, doesn't work on an iPad)