This database includes articles from journals, magazines, newspapers, and more. You may be successful with more specific searches here than in the catalog or World Book.
These online encyclopedias are a great starting point for research.
When you use images in online work, it is important to respect copyright and give proper credit. The Creative Commons Search is a great way to find images that you are allowed to use.
ImageQuest is a great place to find images for your project. All images in Brittanica are rights-cleared for school assignments.