Mr. Robert Casselberry

Phone: 210-356-1800


Degrees and Certifications:

Social Studies Composite 6-12 Masters in Educational Leadership, Lamar University Bachelor's in Social Studies Education UT Austin Bachelor's in Advertising Management UT Austin College Board AP US HISTORY Reader 6 years.

Mr. Robert Casselberry

 Hi there!  This is my second year at Reagan High School..and my 22nd year teaching!  I teach 4 sections of AP US HISTORY and 2 on level classes of US HISTORY.   I am a proud graduate of THE University of Texas at Austin.  I have degrees in Advertising Management and Secondary Social Studies Education.  I have a Masters Degree in Education Leadership from Lamar University. 

My passions are history, sports, being outdoors and spending time with friends and family.

Tutoring:  Monday, Tuesday, Thursday 7:45-8:45.  After school by appointment.




  • 1st Period- US HISTORY

    2nd Period- US HISTORY

    3rd Period- AP US HISTORY

    4th Period- Conference/PLC

    5th Period- Lunch

    6th Period- AP US HISTORY

    7th Period- AP US HISTORY

    8th Period- AP US HISTORY