Harcourt School Publishers

Hbschool.com has 2 URLs listed in 2 Dmoz categories.

Harcourt Math Glossary
Animated and illustrated definitions of math terms for elementary school students. Organized by grade level and alphabetically. [Requires Flash]
http://www.hbschool.com/glossary/math2/index_temp.html
Top/Kids_and_Teens/School_Time/Math

A Virtual Tour of Cave Paintings
Cave paintings let us learn about the lives of people long ago. People painted animals and even painted outlines of their hands. Take a look.
http://www.hbschool.com/activity/cavepaintings/cavepaintings.html
Top/Kids_and_Teens/School_Time/Science/The_Earth/Prehistoric_Times