A Teacher's Guide to the Holocaust from the Florida Center for Instructional Technology - great site
http://fcit.coedu.usf.edu/holocaust/

The Holocaust--A Guide for Teachers
http://www.remember.org/guide/index.html

Academic Info Holocaust Studies
http://www.academicinfo.net/histholo.html

Holocaust
http://holocaust.about.com/education/holocaust/msub5.htm

Holocaust Teacher Resource Center
http://www.holocaust-trc.org

Auschwitz Alphabet
http://www.spectacle.org/695/arbeit.html

Holocaust Poetry
http://holocaust.about.com/education/holocaust/msub20.html

Holocaust
http://holocaust.about.com/education/holocaust/mbody.htm

Some other sites (whose names I didn't write down!)
http://remember.org/mooney/gunskirchen-intro.html
http://remember.org/witness/cowling.html

Reference site
http://pwl.netcom/~jdmeyer/shoah.htm

Women and the Holocaust
http://www.interlog.com/~mighty

Light from the Yellow Star (the text)
http://holocaust-trc.org/ylstr01.htm

Text of "To the Little Polish Boy Standing with His Arms Up" with photograph
http://www.holocaust-trc.org/FischlPoem.htm