Why not see if other universities have open courseware in similar areas to where you are

Tufts University Open Courseware

MERLOT - Multimedia Educational Resource for Learning and Online Technology

MIT Open Courseware

Open University Open Courseware

Carnegie Mellon University Open Courseware

Open Courseware Consortium

Utah State Open Courseware

Thats just a few links to a few open courseware sites - and they are all academic sites. A quick search on the web will reveal all manner of sites and e-learning materials.

When looking for ideas from the web - don't just think open courseware. There are various other web sites and technologies out there that could help you make learning materials. For example :-

• Google Maps - satelite maps covering most of the planet, and on Google Moon, some of the moon as well
• RSS Feeds - RSS Feeds are a way of sites that frequently change content publishing this fact - if there are magazines or newspapers you're students might find useful - why not see if their website has an RSS Feed.
• Podcasting - records lectures or discussions on themes and publish them online
• Blogging - discuss topics and invite feedback