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Dr. Jefferie Thielbar

My name is Jeff Thielbar but most students call me “Dr. T.” I teach International Honors Biology. I have been in education for 32 years as a science teacher and an administrator. I came to Texas eight years ago after teaching high school biology in Wyoming and serving as a high school Principal in both Wyoming and Alaska. I attended the University of Wyoming where I received my Bachelor of Science degree, Master of Science degree, Education Specialist degree, and Doctor of Education.

I was born in Pueblo, Colorado, but my father was in the Navy and we moved around a lot. I enlisted in the U.S. Marines when I was seventeen and retired from the Army National Guard in 2003 with over 20 years of service to my country. I currently serve as a member of the Collin County Marine Corps League. I have three passions in life. Lifelong learning is one of them.  Serving my country, community, and family is another. I guess that is why I have been in education for so long.  The third is traveling.  I enjoy learning about new places. I have been to all fifty states in the United States and several countries. Carlan and I are always looking forward to the next place we can visit and learn about the culture.

I usually spend my free time with my family. Carlan and I have 5 children, 17 grandchildren, and a dog named Ruby.  


  • 1st Period IH Biology       Room 5-212            Google Class Code      itfpumh

    2nd Period IH Biology      Room 5-212            Google Class Code     oemk6h6

    3rd Period IH Biology       Room 5-212            Google Class Code      7n6pvbp

    4th Period IH Biology        Room 5-212            Google Class Code      cn3lw4y

    5th Period IH Biology        Room 5-212            Google Class Code      uzn7pc5

    6th Period IH Biology        Room 5-212            Google Class Code      sc35v2o

    7th Period Conference  

  • TUTORIAL SCHEDULE

    Tuesday 7:30 - 8:30 am

    Wednesday 4:20 - 5:00 pm

    Other times by appointment