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 fifth 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 17 and 14.



    Hot Diggity Doo Dah

    August 14, 2021


    First Day of School 

     August 16, 2021



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Class Schedule

  • Bell Schedule

     Office Hours 


    Monday, Tuesday, Thursday and Friday

    8am to 8:50am



    or by appointment