Phone: 520-696-5622


Degrees and Certifications:

B.S. Biology (Focus on physiology) Minor in Chemistry M.Ed. Teaching & Teacher Education

Mr. Chad Castillo

Welcome to the 2020 - 2021 School Year, Dorados!

I wish that we could begin the school year in the "NORMAL" fashion, however; I am excited to meet everyone and get started in our new online format!

 Please read below for more information about my classes and how to log on to my Google Classroom (the main platform for all of my classes).  If you have any questions, please contact me through my school email:


Materials needed for ALL classes:

Please be ready by Monday (08-10) with the following items:

• TWO Composition Notebooks (100 page preferred)

• A way to access Google Classroom (Tablet, Computer, Phone)

• Two Pocket Folder specific to Biology/Chemistry class



Background Information

This is my sixth year at CDO and eleventh as an educator in Tucson.  I am a life-long Tucsonan having graduated from Salpointe in 2002, and the U of A in 2007. I have an awesome nurse practitioner wife and 3 kids under the age of 8!  I'm also the head club swim coach for the La Paloma swim team.  


Core Beliefs

I believe that the ability to think scientifically is one of the most beneficial skills to have in life!  Helping students develop and practice the skill of "thinking scientifically" in their life drives my teaching style. 



2010-2012 Maxwell Middle School, TUSD

2012-2015 Palo Verde H.S., TUSD

2015 to present CDO

I have been a high school swim coach since I was 19 years old.



Associate in Science; Pima C.C.

B.S in Biology; Minor in Chemistry: University of Arizona

M.Ed. Teaching & Teacher Education: University of Arizona


Professional Accomplishments

Southern Arizona Swim Coach of the Year: 2010/11/12/14/15

Member of the staff that helped to turn around Palo Verde High School from a "D" school to an "A" school