Phone: 210-356-0420


Degrees and Certifications:

Advertising Journalism Teacher Certification at UTSA History 6-12 Social Studies Composite

Mrs. Sandi Guenther

Greenback Night Presentation


Welcome to our US History class. I am delighted to teach your children their last EOC tested content US History. This will be my 19th year of teaching history. I started teaching after spending some time in corporate america. My first teaching position was at Tejeda Middle School in Texas History. After 5 years I went to 8th grade US History for the next 7 years. I was blessed to have the opportunity to move to high school here at CT Johnson. It is by far my favorite teaching experience.

I am a mother of two daughters. Ashley is a teacher as well at Tejeda Middle School. She is married to Austin and they have a dog named NOva.  Amber is a Wedding planner. Amber and her husbanc Tom have our first grandbaby, Thomas. They also have two dogs Holly and Charlie. My husband Buddy is retired and takes care of the home and our dog, Bailey. We are a soccer family and love to be outside (unless it is 100). 

I am a firm believer in "it takes a village" so feel free to contact me anytime at


We use in the Google classroom and Remind so please email for your student's class period code and text code. 

Class Schedule


    Mrs. Guenther’s tutoring Hours:

    Monday 8:15-8:45 and Thurs. 4:25-4:55



    Period   Subject              

    1          Conference          8:50 am            

    2          US history                 

    3          US History          

    4          US History           Lunch

    5          US History                                         

    6          US History                                         

    7          US History                                      

     8         US History