Consider using your school/college letterhead.
Dear Standardized Patient Instructor,
Thank you for your interest in educating the next generation of pharmacists. We believe pharmacists are important members of the health care team, and we are enthusiastic about giving them an opportunity to practice their communication skills.
During this practice simulation you will: 1) role-play as a patient, and 2) facilitate the debriefing sessions with the students. Enclosed are the documents to inform you about your two roles for this practice communication simulation. It is important that you read the documents before coming to the scheduled training session on [date here] at [location here]. We have included 1 hour compensation for preparation time.
Enclosed are the following documents:
Please feel free to call or email me.