Phone: (469) 752-6939


Degrees and Certifications:

BS in Psychology from Baylor Education degree in secondary science from University of North Texas

Mrs. Christina McDuffee

My education began with a Bachelor of Science degree in Psychology from Baylor University (Go Bears!) and ended with a Secondary Education Degree from the University of North Texas.  I have spent most of my life in Texas and have resided in Plano for 29 years.  It is here that I have had the privilege of educating students for the last 16 years.  My three children all graduated from Plano schools, so I know the benefits of an excellent education system.  I love spreading my passion for science to my students.  I enjoy spending time outdoors, and the beach makes me especially happy.  Guinn students hold a special place in my heart, and I hope to make a difference each school year.


Teacher Schedule

  • Biology

    Environmental Systems




Tutorial Schedule

  • 8th period conference

    Tutorials are before or after school as needed.