- Polytechnic High School
- Science Department
Departments

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Degrees and Certifications:
Science Department : Felicia Walker
Biology, Science Department Head
Education
BS - Texas Woman's University
Other Assignments
Science Department Head

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University of Maryland at College Park and Johns Hopkins University
Keith Byrd
AP Statistics, AP Biology, AP Environmental Science, Pre-AP Biology
I love learning and I love watching students learn and succeed! Math, Biology and Computers are my favorite subjects. I obtained my Ph.D. in Biology studying the nuclear organization of DNA and how that affects gene expression. I have 2 sons who are 16 and 9. I teach Biology for science majors and sometimes Genetics at TCC-Northeast Campus, where my wife, Kristin, is a Biology Professor and Co-chair of the Biology department. I love watching and participating in sports (particularly biking, golf, swimming and tennis).
Other Assignment
After School Tutor
UpwardBound Instructor

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Faith Simon
Biology
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Ranjini Nagaraj
Chemistry

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Michael Orlando
Biology and Chemistry
Education
BSA - The University of Texas
Etc.
This is Mr. Orlando's first year at Poly. His interests outside of school are triathlons, running, and cycling. He also enjoys playing frisbee golf with friends.
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Xitali Sedano Jimenez
Environmental Science

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Scarlett Sun
Biology and IPC
Education
BS - Georgetown University
Etc.
Ms. Sun is new to Poly this year and is excited to be here. Her hobbies include ceramics and cooking. She loves any outdoor, aquatic, and artistic activities.
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Curtis Swiney
Physics