“Internet Filters: A Public Policy Report” provides an extensive list of valid web sites that have been blocked erroneously by various filtering programs at one time or another. Here are some of the sites blocked by the filters most commonly used in K-12 schools:

N2H2’s Bess

• Friends of Lulu, a national nonprofit organization whose purpose is to promote and encourage female readership and participation in the comic book industry.

http://friends-lulu.org

• Alice!, the Columbia University Health Education Program site, which aims to increase access to health information by providing information on people’s physical, sexual, emotional, and spiritual health.

http://www.goaskalice.columbia.edu

• Congressman Ed Markey’s site, the official web site of the Massachusetts Democrat.

http://www.edmarkey.org

SurfControl’s Cyber Patrol

• The Flag Burning Page, featuring information about the constitutional issues surrounding flag burning. The site has been taken down in response to death threats made in the wake of the Sept. 11 terrorist attacks.

http://www.esquilax.com/flag

• Sisterhood is Global Institute, an organization opposing violations of the human rights of women worldwide.

http://www.sigi.org

Symantec’s iGear

• Book X of “The Confessions of St. Augustine,” featuring the actual text of the Catholic saint’s writings, in Latin. Researchers from the National Coalition Against Censorship speculate that the use of the Latin word “cum” kept the site from passing muster.

http://ccat.sas.upenn.edu/~jod/latinconf/10.html

• The Electronic Privacy Information Center’s legal challenge to the Communications Decency Act.

http://www.epic.org/free_speech/censorship/lawsuit

• Planned Parenthood, the world’s largest family planning organization (and an advocate of a woman’s right to choose abortion).

http://www.ppfa.org

8e6 Technologies’ X-Stop

• Carnegie Mellon University’s Banned Books page, which lists worthwhile books that have been outlawed in some communities.

http://www-2.cs.cmu.edu/People/spok/banned-books.html

• American Association of Univer-sity Women, an organization for women in higher education.

http://www.aauw.org

• The AIDS Quilt site, featuring the history and significance of the quilt.

http://www.aidsquilt.org/aidsinfo

• Y-ME, a national breast cancer support organization.

http://www.y-me.org

WebSense

• TeenGrowth, featuring board-certified physicians that give kids the scoop on puberty, family, friends, drugs, sex, and emotions.

http://www.teengrowth.com

• The Sterling Funding Corp., a California-based mortgage loan company.

http://www.sterlingfunding.com