To determine if a resource might be useful, you will need to evaluate the information in the resource and decide if it is valid, useful, accurate, reliable, and relevant. You should also check the date of publication.

url = uniform resource locator or universal resource locator, this is the address of a specific internet site or resource.

url = uniform resource locator or universal resource locator, this is the address of a specific internet site or resource.

url = uniform resource locator or universal resource locator, this is the address of a specific internet site or resource.

Many people use this very web-site as an educational resource.