Phone: 210-356-0420


Degrees and Certifications:

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

Mrs. Sandi Guenther

Greenback Night Open House video


Welcome to our US History class. I am delighted to teach your children their last EOC tested content US History. This will be my 18th 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. Amber runs her own business as a Calligrapher and she also is a wedding planner. Amber and her husbanc Tom have our first grandbaby, Thomas. My husband Buddy is retired and takes care of the home and dog. 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:

    Mon, Thurs. and Fri. 9am and Thurs. 3:30



    Period   Subject              Mon-Wed Fri         Tues/Thurs

    1          Conference          10-11            

    2          US history          11:10-12:50  (B lunch)       

    3          US History           1:15-2:15

    4          US History           2:25-3:25

    5          US History                                         10-11:30

    6          US History                                         11:35-1:50 B Lunch

    7          US History                                         1:55-3:25