When you're trying to determine if a source is reliable or not, start out by giving it the CRAP test:
Strategies for spotting fake news from factcheck.org (check out the link for more info!):
The Verification Handbook shows how journalists check their information for accuracy
Really Cute, but Totally Fake: How a fake video of a pig rescuing a baby goat went viral
Girl Catches Fire Twerking: How Jimmy Kimmel fooled other media organizations
Tracking Down a Fake News Creator: Locating a fake news writer and learning about his motivations
How Fake News Goes Viral: Tracing the origins and spreading of a fake news story
Digital Resource Center: News literacy lessons and standards
Source Reliability Checklist: Graphic organizer to help students assess a source
NPR: Students Have 'Dismaying' Inability To Tell Fake News From Real, Study Finds
Stanford Study Findings: Report on student media literacy including sample student work
Skydiving Without a Parachute: Lesson which has students assess a fake video
Skills and Strategies: Fake News vs. Real News from the New York Times
Teaching History Students to Recognize Bias
Students Need Our Help Detecting Fake News
Classroom Media Literacy Resources from the International Literacy Association and the NCTE