National Association for Interpretation

Just came across this group, the National Association for Interpretation. From their website:

... a professional association for those involved in the interpretation of natural and cultural heritage resources in settings such as parks, zoos, museums, nature centers, aquaria, botanical gardens, and historical sites. For more than 50 years. NAI and its parent organizations have encouraged networking, training, and collaboration among members and partners in support of our mission: inspiring leadership and excellence to advance heritage interpretation as a profession.

They sponsor a national conference and publish a journal as well as a magazine, which has many thematic issues, publish and sell books about the field, etc.