Professor Richard P. Castillo has taught Spanish to decades of students at College of San Mateo, including specialized courses for firefighting, law enforcement, county government services, emergency medical treatment, on-site hospital medical services, nursing recertification, and dementia care.
K.D. Sullivan is the founder and CEO of Creative Solutions Editorial. She speaks and trains nationally on producing error-free business communications, and is the author of Go Ahead...Proof It! (Barron's, 1996). With Dr. Ann Longknife, she is also the author of The Art of Styling Sentences (Barron's, 2002).