Degrees and Certifications:

BS in Mathematics with an emphasis in Secondary Education, University of Arizona National Board Certified Teacher (Adolescent Mathematics)

Mary Hjalmarson-Kittredge

 If you need technical support with the platforms being used ( ALEKS and the online textbook) or District devices, please contact our site tech, Charles Loy, at or 696-5708 or parents/students can send email to

Welcome students and parents.  This site is designed for students currently in my math classes as well as their parents and guardians.  I am currently teaching Geometry and Advanced Geometry.  This is my 9th year teaching at CDO and I absolutely love the students and faculty.  I graduated from CDO in 1980 and it is great to be back in "Dorado Land". 

 Core Educational Belief

I believe that all students can learn and be life-long learners.  Therefore, I strive to provide diverse educational opportunities that encourage my students to become innovative and knowledgeable about mathematics in order to pursue future endeavors.

 Prior Experience

- 1 year teaching at McKemy Junior High School, Tempe, AZ

- 10 years teaching at Marana High School, Marana, AZ

- 8 years teaching at Cross Middle School, Tucson, AZ

- 9 years teaching at Canyon del Oro High School, Tucson, AZ