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Mary Katherine Harris

Dr. Mary Katherine Harris

Assistant Teaching Professor of Education (SPLED)


  • Educational Psychology, Counseling, and Special Education


  • Special Education


Mary Katherine Endicott Harris (Katie) is an Assistant Teaching Professor of Education for the College of Education at Penn State. She is a board-certified behavior analyst who has more than 20 years of experience working with children and adults with autism and severe disabilities in a variety of environments. She has served as a special education teacher, special education coordinator, behavioral consultant, and assistant professor.


She earned her undergraduate degree at the University of California at Berkeley, her special education credential at Chapman University, and her doctoral degree at Utah State University in the Department of Special Education & Rehabilitation with an emphasis on applied behavior analysis.


She continues to be incredibly passionate about helping educators effectively assess and treat challenging behavior and establish programming through the science of applied behavior analysis. Research interests include verbal behavior and play skills.

Areas of Expertise

Age Levels

Early Childhood


Classroom Management

Special Education

Early Intervention
Mild Disabilities
Severe Disabilities
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