Phone: 469 - 219 - 2180 x80437


Degrees and Certifications:

B.S. in business Administration with a concentration in Marketing with a major in mathematics from Trinity University

Mr. Alex O'Brien

Hello and welcome to the 2020-2021 school year! This is my fourth year at Prosper High School and my 16th year in education.  My wife and I moved to Prosper in 2015 and we have two sons (3 and 6 years old) and a dog.  I love the Prosper community and am looking forward to a great school year!


This year I will be teaching:

1st:  AP Calculus AB

2nd:  AP Calculus AB

3rd:  AP Calculus AB

5th:  Honors Pre-Calculus

6th:  Honors Pre-Calculus

8th:  Honors Pre-Calculus

My conference periods are 4th and 7th period. 


Tutuials are offered during Eagle Time and before school at 8am.  After school tutorials are by Appointment only.  


Virtual Open House Presentation


Students can find classroom materials and assignments on Google Classroom.  Students are automatically enrolled through Skyward.

If you have any questions about me or my class please feel free to email me at any time (