Phone: 210-356-0567


Degrees and Certifications:

BS, Geography, Northern Arizona University, Flagstaff, AZ JROTC School of Cadet Command (JSOCC), Fort Knox, KY JROTC Distance Learning Course (JROTC DLC) NRA Rifle Coach Level 1 Civilian Marksmanship Program (CMP) JROTC Marksmanship Instructor Course (JMIC)

Mr. Thomas Groggett MAJ (Ret)

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Also click on the topics in the anouncements to see the things our Cadets have been up to

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I have served at many levels and unit assignments throughout my military career with a focus to improve and make each one better than before. I have always worked to enable those I have been honored to teach and mentor to achieve more. My formal military training as an Explosive Ordnance Disposal Officer has exposed me to many training techniques and courses. As a secondary mission I have trained numerous soldiers and personnel on basic explosive safety and other hazards associated with the numerous contingency and combat operations being conducted. I have experienced training US, NATO members, Eastern European, Iraqi personnel, all who have their own unique cultural background styles. The biggest pleasure that I have attained though is teaching the future of this great country

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Class Schedule

  • Class Schedule: 2021 -2022 School Year


    Morning Practice6:30-8:30 am
    1st Period—8:50-9:45 am
    2nd Period—9:50-10:45 am
    3rd Period—10:50-11:40 am
    4th Period—11:45-12:35 pm | Teacher Duty
    5th Period—12:40-1:30 pm | Conference
    6th Period—1:35-2:25 pm
    7th Period—2:30-3:20 pm
    8th Period—3:25-4:15 pm
    Evening Practice4:30-6:30 pm


    Morning Practice 6:30-8:30 am
    1st Period—8:50-9:40am
    2nd Period—9:45-10:30 am
    -Flex-—10:35-11:15 am
    3rd Period—11:20-12:05 am
    4th Period—12:10-12:55pm | Teacher Duty
    5th Period—1:00-1:45 pm | Conference
    6th Period—1:50-2:35 pm
    7th Period—2:40-3:25 pm
    8th Period—3:30-4:15 pm
    Evening Practice4:30-6:30 pm

    Monthly Early Release-Tuesday                      

    1st Period    8:50-9:26 am                                       Semester 1                                         Semester 2                                                    
    2nd Period   9:30-10:06 am                                   August 30, 2022                                 January 31, 2023
    3rd Period   10:10-10:45 am                                 September 27, 2022                           February 28, 2023
    4th Period   10:49-11:24 am A Lunch                   October 25, 2022                                March 28, 2023
    5th Period   11:28-12:03 pm B Lunch                   November 29, 2022                            April 25, 2023
    6th Period   12:07-12:42 pm C Lunch                   December 15-16, 2022                      May 23-25, 2023
    7th Period   12:46-1:21 pm                                   (Semester Exams)                              (Semester Exams)  
    8th Period   1:25-2:00 pm

     Students Dismissed
    2:10-4:30 pm PD/PLC  
    2:00 Early Release Days for Teacher PLC

    (Professional Learning Community)  

CT Johnson JROTC Shoulder Patch