Relevance - How is this information relevant to your assignment?
Authority - Who is the author? What makes this person or organization an authoritative source?
Date - When was this information published and is the publication date important to you?
Accuracy - Where are they getting their information from? Does it have citations and references? Are they using reputable sources or explaining how they gathered their data?
Reason for writing - Why did the author publish this information?
Adapted from Mandalios, J. (2013). RADAR: An approach for helping students evaluate Internet sources. Journal of Information Science, 39(4), 470-478.