Phone: 630-682-2474


Degrees and Certifications:

BS Elementary Education- NIU, Masters Early Childhood w/Special Education Endorsement- Dominican, ESL Endorsement and Masters in Administration- Aurora University

Ms. Cassi

My name is Cassi Williston.  I have been teaching for the past 32 years.  The past 19 years I have been teaching in District 200 in the Early Childhood Department.  My husband and I are both Wheaton North graduates. We have two daughters that also graduated from Wheaton North.  Our oldest attends Cherubim- a Developmental Day Program for adults with disabilities. Our youngest recently completed her Master's in Clinical Exercise Physiology with an emphasis on cancer rehab and is living in Oahu.
I enjoy reading, kayaking and spending time with family, friends and our dogs Moose and Stein. 


Speech and Language Pathologist- Nicole MacKinnon
Occupational Therapist-               Ashley Schneider                                   
Physical Therapist-                       Elizabeth Taylor
Teaching Assistants-                    James Oliver Mack AM
                                                     Judy Wynn             AM
                                                     Patti Wanzung        PM