AGIS for Windows

A free GIS manipulation program.

agismap.com/index.html

Practical Guide to GPS - UTM

An in-depth guide on everything you could want to know about GPS, from buying a unit, to working the unit, to how GPS works.

dbartlett.com/

Geography and GIS—Serving Our World

This site has hundreds of case studies on groups that have used GIS to improve their community. If you can use GIS software to do it, it will be showcased here.

esri.com/mapmuseum/mapbook_gallery/volume18/index.html

ESRI GIS and Mapping Software

An industry leader in GIS and mapping software.

esri.com/

Geography Network

A listing of maps and data that you can manipulate with GIS software.

geographynetwork.com/freeresources.html

Free Geo-Data

Over a dozen links to data that can be used in GIS software.

freegis.org/geo-data.en.html

History of Theater

Information on the history of theater from a wide variety of countries.

theatrehistory.com/index.html

Algebra Help

freemathhelp.com/algebra-help.html

Picturing Modern America

Become a historian by interacting with and investigating historical photos. Participate as an "image detective," begin "investigations" or be an "exhibit builder."

edc.org/CCT/PMA/

Aqua Net: The Oceanography Network

The Aquatic Network provides information about living resources and technology relating to marine and freshwater environments.

aquanet.com/

International Children's Digital Library

Read through over 500 free children's books online. Search for a book by keyword, world location, type and subject.

icdlbooks.org/

NCTM Illuminations

Provides models of mathematical teaching using engaging, interactive activities matched to NCTM Standards. Includes interactive math tools, Electronic Example Index, and i-Math Investigations.

illuminations.nctm.org