Quality
Peer Review available or used
Pedagogical methods are sound
Reputation of author/ institution is transparent
Allows for customization
Appropriateness
Content is accurate
Sources are identified and cited
Some alignment with a learning outcome or course objective
Appropriate reading/ domain level for your students
Technical
High technical quality (clear visuals, high production value)
Clear licensing declaration (Creative Commons License, in Public Domain, etc.)
License to remix or share again