Here are tools to help you decide whether a resource is reliable or not:
Fact-Checking tools:
The Washington Post fact-checker
Hoaxy: search by keywords to see how fake news and fact-checking spread
Media Bias/Fact-Checker: allows you to see how politically biased a particular media is, as well as reputable/credible it is.
AllSides: "See issues and political news with news bias revealed. Non-partisan, crowd-sourced technology shows all sides so you can decide."
Website Credibility Evaluation Systems
The "CRAAP" test: evaluate sources for Currency, Relevance, Authority, Accuracy, and Purpose
Online book Web Literacy for Student Fact-Checkers, by Mike Caulfield
Craig Silverman's Verification Handbook and the "Six Steps to Spot Fake News" document attached to this page.
List of credible sources for news
List of websites to avoid
Use the Finding tool (Command + F on a Mac, Control + F on a PC) on this document to see if the name of the website you are using is listed there.
Resources for teachers