Professional Ski Instructors of America & American Association of Snowboard Instructors

The Professional Ski Instructors of America and American Association of Snowboard Instructors (PSIA-AASI) is a nonprofit education association involved in ski instruction. PSIA-AASI establishes certification standards for snowsports instructors and develops education materials.

Source: Wikipedia — Professional Ski Instructors of America & American Association of Snowboard Instructors (CC BY-SA 4.0)