Phone: 469-752-4688


Degrees and Certifications:

Mrs. Williamson

Mrs. Williamson is starting her 10th year at Armstrong and her 32nd year in Plano ISD.  She serves as the Math academic support teacher and math department chair.  

Mrs. Williamson is a Plano product.  She attended Houghston Elementary, Haggard Middle School, Clark High School, and Plano Senior High School.  She has a bachelor’s and master’s degree from the University of North Texas.  

In her spare time, she enjoys everything sports related, especially college football and basketball.  She and her husband, David, have 2 children: Colin (23) and Laurie (19). Laurie is starting her second year of college at Ole Miss.  

Contact information:



  • Tutorials  


    The math department holds tutorials on Thurday morning from 7:50 - 8:20 and Thursday afternoon from 3:30 - 4:30.  These are done in the cafeteria.

    Students who have a grade below 70 are required to attend Thursday morning tutorials.  The teacher will determine the necessary length of time.  

    Students who are missing assignments are required to attend math extended day on Thursday afternoon from 3:30 - 4:30.  This is held in the cafeteria.