Most search engines automatically search for plurals of search words. Some
search engines (e.g. Google)
only find sites where ALL the search words occur.
Click here for a
tutorial on searching,
further information on searching
or a treasure hunt that gives you more search practice.
The trusty guide to internet research gives you advice about finding information
on the internet.
Two sites, T is for Thinking and
The Internet Detective both teach you how to evaluate the information you find.