These are directories of sites that have been pre-evaluted for currency and accuracy.
The CRAAP test is a way to evaluate a source based on the following criteria: Currency, Reliability, Authority and Purpose/Point of View. Below are some questions to help you think about how to measure each of the criteria.
There are many wonderful and reputable sources on the Internet but often it can be difficult to find them after weeding through all the sites that come up in a Google search.
Some criteria to look for include:
What type of domain does this page come from?
Who wrote the page?