Original sentence: His technique, skills, personal commitment, and teaching abilities have taken him to countries around the world, including Germany, United Kingdom, Denmark, Poland, France, Sweden, Finland and Mexico, not to mention teaching and presenting seminars in cities across the United States
Edited sentence: He has completed and taught in various countries around the world, including Germany, United Kingdom, Denmark, Poland, France, Sweden, Finland and Mexico, not to mention teaching and presenting seminars in cities across the United States