About Teacher

Phone: 210-356-0900


Degrees and Certifications:

B.A. Special Education EC-12 Special Education Certification

Mr. Charles M. Castillo

I am excited to start my fourth year at ISA, as the Special Education Co-Teacher! I joined the ISA family during the second semester of the 2016-2017 school year, after starting my fourth year at Judson ISD. During my time at Judson ISD, I co-taught 6-8 ELAR and taught 6-8 Resource ELAR. My transition to ISA was smooth due to the wonderful faculty and administration.

I was born in New York, and grew up in Maryland. We lived 20 minutes outside of Washington, D.C.  I earned my BA in Special Education, at Hood College in Frederick, MD. I have two awesome boys that are ages 16 and 13.


     First Day of School

     August 17, 2020



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Class Schedule

  • Bell Schedule

     Office Hours 

    Monday and Thursday


    Tuesday and Thursday


    or by appointment