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Faculty & Staff

Meet Our Faculty 

Lower School

Photo of Sabrina Archer
Sabrina Archer, M.A.T.

Lower School Teacher


Education: Ms. Archer received both her Bachelor of Arts in Political Science and her Master of Arts in Teaching from Trinity University.

Expertise: Ms. Archer teaches Lower School Kindergarten through 2nd grade. Prior to coming to Winston in 2022, she taught in San Antonio Independent School District for 2 years.



Catherine B. Brackett, M.A.T.

Lower School Teacher


Education:  Ms. Brackett attended Trinity University where she received her B.A. in Humanities and her Master's degree in Teaching. She is also a Certified Academic Language Therapist in training.


 Miss Chaves, M.Ed.

Lower School Teacher


Education:  Miss Chaves received her Bachelor's degree in Elementary Education with a Minor in Reading from the University of Northern Colorado. She has a Master's degree in Teacher Leadership from the American College of Education.

Expertise: Miss Chaves has experience as a reading tutor, an academic interventionist, and has taught various grades in K-6 but spent most of her time as a 2nd-grade teacher. She has been teaching since 2014. 


Carrie Clewett, M.Ed., M.A.

Lower School Teacher


Education: Mrs. Clewett received her Bachelor’s of Science with a major in Aerospace Engineering from Embry-Riddle Aeronautical University in Prescott, Arizona.  Later, she received her Master's degree in Reading and another Master's degree in Educational Leadership from St. Mary's University in San Antonio, Texas.

Expertise: Mrs. Clewett teaches Lower School math and social studies. Prior to Winston, Mrs. Clewett served in the United States Air Force as a developmental engineer, then taught third grade, fifth grade, and accelerated math during her eleven-year career in elementary public school.

Photo of Cloe EseoChloe Eseo, B.S.

Lower School Art Teacher


Education: Ms. Eseo received her Bachelor’s of Science with a major in Art Education from Radford University.

Expertise: Ms. Eseo teaches Lower School art. Prior to Winston, Ms. Eseo taught middle and high school art, as well as several years of elementary art.


Photo of Shelly Guzman
Shelly Guzman, B.A.

Lower School Teacher


Education:  Mrs. Guzman received her Bachelor of Arts at the University of Texas San Antonio.

Expertise: Mrs. Guzman taught for 10 years in NEISD, 8 of those years she taught third grade and 3 of those years she taught kindergarten.



Photo of Noelle Higdon
Noelle Higdon, B.A.

Lower School Teacher


Education: Ms. Higdon received a Bachelor of Arts degree in English from Texas A&M University. She is trained in several Orton-Gillingham based reading intervention programs

Expertise: Ms. Higdon teaches Lower School science and Take Flight dyslexia intervention for 5th and 6th grade students. She has been a classroom teacher and interventionist in both public and private schools for 13 years.


Photo of Kristal Kelley
Kristal Kelley, B.A.

Lower School Teacher


Education: Ms. Kelley received her Bachelor of Fine Arts degree in Elementary Education and Early Childhood Education from The University of Texas San Antonio.

Expertise: Ms. Kelley began her teaching career in San Antonio in North East Independent School District. She was with the district for 8 years. She began subbing and teaching at The Winston School San Antonio Summer Program in 2016. She joined the lower school team in 2020.



Photo of Jenn Smith
Jenn Smith, B.S.

Lower School Teacher


Education:  Mrs. Smith received her Bachelors of Science degree in Education with a Minor Art Education from Northern Arizona University. She earned her California Multiple Subject Teaching Certification for grades K-6 from the California Commission of Teachers.

Expertise: Mrs. Smith began teaching in 1997 in San Diego, California, and has over 12 years of experience in the classroom. Outside of the classroom, she’s been teaching all the while. In California, she owned her own in-home daycare/preschool; when she moved to Texas, she started her own tutoring company which specialized in dyslexia and other learning differences. She has found “her happy place” once again, at Winston in the 2nd grade.


Photo of Zalena Su’e
Zalena Su’e, B.S.

Lower School Teacher

Email: zsu'

Education: Miss Su’e received her Bachelor’s of Science degree in English from Corban University.

Expertise: Miss Su’e teaches Lower School math and social studies. She began her teaching career in American Samoa as a STEAM teacher for primary and middle school students. 


Middle School


Photo of Kit Prezkuta
Kit Prezkuta, B.A.

Middle School Teacher


Education: Miss Prezkuta received her Bachelor’s of Arts degree in English from Metropolitan State University of Denver. She has also trained under the Orton-Gillingham approach.

Expertise: Miss Prezkuta teaches Middle School. She taught 3rd grade here at Winston last year,  and for two years at a private independent school in Denver, and has been in various roles in a number of different grade levels for nine years. 



Photo of Kimberly Sultemeier
Kimberly Sultemeier, M.A.

Middle School Teacher


Education: Ms. Sultemeier received her Bachelor of Science Degree in Experimental Psychology at The University of the Incarnate Word and attended graduate school at the School of Psychology at Trinity University.

Expertise: Ms. Sultemeier is a Middle School teacher. She teaches Science. Before Winston, she taught 5-8 grade Math and Science at St. Thomas More Catholic School. She also taught ESL Biology/Chemistry at Roosevelt HS. She began her teaching career at Fort Sam Houston ISD.


Upper School

Photo of Robyn Borth
Robyn Borth, M.Ed.

Upper School Teacher


Education: Mrs. Borth received an Associate’s Degree in Special Education from the University of Great Falls; a Bachelor of Science Degree in Elementary Education from the University of Montana Western; and a Master of Education in Reading Curriculum and Instruction from Grand Canyon University.

Expertise: Mrs. Borth has taught Middle School Language Arts and Reading, as well as U.S. History and College & Career Prep in our Upper School. Prior to coming to Winston, she taught in both the public and private school sectors, primarily in the area of special education.


 Photo of Giovanni Cavatorta

Giovanni Cavatorta, M.B.A., M.S.

Upper School - Math Teacher


Education: Mr. Cavatorta received his Master of Science Degree in Computer Information Systems and a Master of Business Administration from St. Mary’s University.

Expertise: Mr. Cavatorta has been at Winston since 2006 and teaches Upper School Math and Upper School Computer Programming.


Photo of Ramiro de Leon

Ramiro De Leon, M.S.

P.E. /Athletics Coach


Education: Mr. De Leon received both his Bachelor of Science in Secondary Education and Master of Science in School Administration from Texas A & I University.

Expertise: Mr. De Leon joins The Winston School with 31 years of experience.   His coaching experience as a Head Basketball Coach includes working at Kingsville IDS, Northside ISD, and North East ISD. 


Morgan Fucheck, B.S.

Upper School Teacher


Education: Miss Fucheck received her Bachelor’s of Science with a major in Interdisciplinary Studies from Sam Houston State University.

Expertise: Miss Fucheck has over ten years of experience working in private schools with a strong drive to guide students to their highest potential by better serving the community to further the learning experience of each student.


Photo of Tricia Hernandez
Tricia Hernandez, M.Ed.

P.E. /Athletics Coach


Education: Mrs. Hernandez received her Bachelor of Science Degree in Health with an emphasis in Business and Industry from The University of Texas at San Antonio and her Master of Education in Exercise Science from Texas State University.

Expertise: Mrs. Hernandez teaches Upper School Health and Speech classes. She also teaches Physical Education for the entire school. Prior to coming to Winston, she served as the head of the Physical Education Department at The Briarwood School, and was highly involved with the school’s Special Olympics program. Mrs. Hernandez also taught and coached in the Pleasanton Independent School District.


Photo of Yasmin Hollowell
Yasmin Hollowell, B.S.

Upper School Science Teacher


Education: Mrs. Hollowell received a Bachelor's Degree in Biomedical Science from The University of Texas at El Paso.

Expertise: Mrs. Hollowell teaches Anatomy and Physiology. Prior to Winston, Mrs. Hollowell worked at an OB/GYN practice in Virginia before moving to San Antonio a year ago. 



Photo of Franklyn Pacheco Franklyn Pacheco, M.S.

Upper School Math and Innovation/Maker Space


Education: Mr. Pacheco received his Bachelor of Science in Mathematics from the University of Texas-Pan American (now called University of Texas - Rio Grande Valley) in December 2010. He went on to pursue a Master of Science in Chemical Engineering from the University of Houston and graduated in December 2013.

Expertise: Mr. Pacheco teaches Upper School mathematics and science. Prior to Winston, he taught science (mostly physics) and math for 5 years with Houston ISD. He enjoys helping students prepare for academic competitions and hopes to start a math group at Winston. Mr. Pacheco also enjoys playing guitar and teaching martial arts.


Photo of Marina Parra-Noonan
Marina Parra-Noonan, M.S.

Upper School Teacher


Education: Mrs. Parra-Noonan received her Bachelor of Science Degree in Environmental Science from New Mexico State University and a Master of Science in Geology from The University of Texas at San Antonio.

Expertise: Mrs. Parra-Noonan teaches Middle School Science and Upper School Sciences. Prior to coming to Winston in 2014, she taught Environmental Science, Physics, and Biology at Holy Cross of San Antonio, and she taught Middle School in the public school sector.


Photo of Rosie Quezada
Rosie Quezada, M.A.T.

Spanish Teacher


Education: Bachelor's of Arts from University of Texas at Rio Grand Valley. Master's of Arts in Teaching in the concentration of Special Education from Goucher College from Baltimore, MD.

Expertise: As a Spanish teacher, she educated students in communicating in foreign languages. She focuses on maintaining student educational potential by applying diverse and engaging instructional strategies, and maintaining classroom management techniques.

Rosie Quezada is a U.S. Army Veteran who served 4-1/4 years and was deployed for 12 months to Camp Taji, Iraq.


Photo of Irma RamirezIrma Ramirez, B.A.

Upper School Math Teacher


Education: Mrs. Ramirez received her Bachelor of Arts degree in Secondary Mathematics Minor in Government from  A&M International University

Expertise: Mrs. Ramirez teaches Upper School Mathematics Algebra 2 and PreCalculus at WSSA. She has taught for nineteen years at public schools in the state of Texas. Prior to coming to WSSA in 2022, she was teaching at NEISD for five years where she taught Algebra 1, Algebra 2, Geometry, and Honors Algebra 2.  She was the Algebra 2  team leader, Algebra 1 STAAR tutor, a member of the technology committee, and co-sponsor of Student Council. 


Photo of Leena SiiteriLeena Siiteri, B.S.

Upper School Science Teacher


Education: Miss Siiteri received her Bachelors of Science degree in Coastal Environmental Sciences and Society with a Minor in Diving Technology and Methods from Texas A&M University.

Expertise: Miss Siiteri teaches Biology, Anatomy, and Marine Biology. She just moved to San Antonio after living in Houston and running an Environmental Microbiology Lab.


Photo of Deanna Strahl

Deanna Strahl, B.S.

Upper School Teacher


Education: Mrs. Strahl received her Bachelor of Science Degree in Elementary Education from Greenville College in Greenville, Illinois.

Expertise: Mrs. Strahl teaches Middle and Upper School English and Math. She has over 30 years of teaching experience, including 1-8th grade and K-12 special education. She came to Winston after spending 25 years in the North East Independent School District.


Photo of Bradlee WhiteBradlee White, B.A.

Woodworking and Metal Shop Teacher


Education:  Mr. White received his Bachelor of Arts Degree in Psychology from Thomas Edison State College.

Expertise: Mr. White teaches Woodwork and Metalwork. A passionate believer in handcraft as both a skill and an art form, he has extensive experience in woodworking, design, and construction. He believes in using historic methods and tools integrated with modern technology and techniques and has built projects for individuals across the country as well as for a museum in Hawaii.


Meet Our Staff

Photo of Charles Acord

Charles Acord

Director of Buildings & Grounds


Expertise: Mr. Acord has been the Director of Maintenance at Winston since 2002. Prior to joining us at Winston, he worked in construction and also owned his own auto repair shop. He holds many certifications, including Ford-trained Service Technician, OSHA, Universal Technician, MVAC Technician, WebCTRL®, Spectra-Physics Laserplane operator, and many others.



Photo of Mike Canales
Mike Canales, M.A.

Interact Sponsor


Education: Mr. Canales received a Bachelor of Arts Degree from the University of Maryland and a Master of Arts Degree in Management from Webster University. His Texas Teaching Certificate is in the area of Special Education.

Expertise: Mr. Canales has taught Spanish I, II, and III at Winston since 2004. Prior to coming to Winston, he worked for 10 years as a special education teacher in one of San Antonio’s largest public school districts.


Photo of Miranda Cushman
Miranda Cushman

Community Engagement Coordinator


Expertise: Mrs. Cushman joined Winston in July of 2022 and brings 15 years of experience in event planning and coordination. Mrs. Cushman has experience in the non-profit sector, cultivating community relationships and advocating for educational expansion. Prior to Winston, she served as the Director of Operations for a local non-profit agency. Mrs. Cushman will manage our Volunteers and assist with the WSPA. Her passions are her children, audiobooks, and sewing. 



Photo of Bianca Flores

Bianca Flores

Executive Assistant to Head of School


Expertise: Mrs. Flores joined Winston in 2015. She has extensive experience in event planning and management. Mrs. Flores provides administrative assistance to our Head of School. She is also responsible for managing the student's records as our Registrar.



Photo of Ashley GuerraAshley Guerra

Administrative Assistant and Registrar


Expertise: Ashley joins Winston with a breadth of experience in customer service and administrative support.  She worked at the San Antonio School of Inquiry and Creativity for seven years until its closing in 2015.  She then began working as the Manager and Personal Assistant to the CEO of National Embroiders and was there for seven years as well.



Photo of Missy Harris

Missy Harris, B.S.N., R.N.

School Nurse


Education: Mrs. Harris received her Bachelor of Science in Nursing from Texas Tech University and she's a Registered Nurse with the State of Texas.

Expertise: Mrs. Harris joined Winston in 2018 after gaining experience in an educational setting at AHISD and NEISD. In her spare time, Mrs. Harris enjoys watching her daughters play sports.


Daniel Hernandez, B.A.

Associate Director of Marketing and Communications


Education: Bachelor of Arts in Mass Communications, Texas State University, 2014

Expertise: Mr. Hernandez was the Marketing and Communications Manager for Good Samaritan Community Services before joining Winston and worked with the Boy Scouts of Americas Alamo Area Council as a Web Content Writer, Photographer, and videographer.


Heidi Johnson, M.Ed.

School Counselor


Education:  Ms. Johnson received her Bachelor of Arts degree in psychology from Siena College in Loudonville, NY, and earned her Master of Education in School Counseling from the University of Maryland in College Park, MD.  She is a Texas certified School Counselor and a CREST award recipient which recognizes model school counseling programs from across the state. 

Expertise: Prior to joining The Winston School, Ms. Johnson served as a School Counselor with Boerne Independent School District.  Additionally, as a former military spouse, Ms. Johnson has lived and worked as a School Counselor and other mental health positions in Maryland, Georgia, Tennessee, and New York.  She is thrilled to be joining Winston and is looking forward to working with our staff, families, and students.

Photo of Mario Leija
Mario Leija

Maintenance Technician

Expertise: Mr. Leija joined the Winston maintenance team in 2020. He keeps our school in beautiful condition.



Photo of Kyle Lindholm
Kyle Lindholm

Maintenance Technician


Education:  Mr. Lindholm received two Associates Degrees in Aviation Power Plant Systems and Aviation Structural Maintenance.

Expertise: Mr. Lindholm has 15 years combined experience of property and facility maintenance and janitorial/custodial services ranging from Military installations to College Universities.


Photo of Ana Lopez
Ana Lopez

Finance Assistant


Expertise: Mrs. Lopez works in Winston’s Business Office processing accounts payable and receivable. Prior to coming to Winston, she had 23 years of experience as the Director of Finance of a local catering company.



Eva Martinez

School Receptionist


Expertise: Ms. Martinez has 15 years in an office setting. She started as the front office receptionist at San Antonio School for Inquiry and Creativity, a charter school district then moved up as the Administrative Assistance to the Superintendent. Before parting ways with SASIC, in 2017 she was the District PEIMS Coordinator. Right before coming to work for The Winston School, she was at the McDonald's - Acosta Franchise office as the office receptionist. 



Photo of Juan Bosco Morales
Juan Bosco Morales, B.A.

Director of Information Technology


Education: Bachelor of Arts in Communications with a major in Radio, Television, and Film from the Universidad Regiomontana.

Expertise: Mr. Morales began his position as Director of Communications for Winston in 2012 and in 2021 accepted the position of Director of Information Technology. Prior to that, he served as owner and VP of Operations for Digital Edge, a communications and video production company.


Photo of Almendra ReyesAlmendra Reyes, M.S.

Licensed Specialist in School Psychology (LSSP)


Education:  Ms. Reyes received her Bachelor's degree in Counseling Psychology from Delaware Valley University and then earned her Master's degree from Our Lady of the Lake University.

Expertise: Prior to Winston, Ms. Reyes worked in San Antonio public schools for five years evaluating students with diverse backgrounds and disabilities. Ms. Reyes joined Winston in 2022.


Karen Ruiz, M.A.

Licensed Specialist in School Psychology (LSSP)


Education:  Mrs. Ruiz received her Bachelor of Arts (B.A.) with a major in Psychology and a minor in Studio Arts from the University of Rochester in Rochester, NY. She earned her Master of Arts (M.A.) in School Psychology from the University of Texas at San Antonio. 

Expertise: Before joining Winston in 2023, Mrs. Ruiz served in special education as an LSSP at different public school districts, including San Antonio ISD and North East ISD. Prior to her licensure as a school psychologist, she gained experience in education as a tutor in Title 1 schools and as an academic coach for a student with disabilities during her undergraduate years. She also served as an instructional assistant in a Head Start program at Edgewood ISD and gained experience in Applied Behavior Analysis (ABA) at the Autism Treatment Center ABA Clinic at Children’s Hospital.

Toni Schexnyder, M.Ed.

Associate Dean of College Counseling


Education: Bachelor of Arts Degree in English and Theatre; Master of Education in Secondary Education from Texas State University.

Expertise: Mrs. Schexnyder joined Winston in June of 2016. Previously, she served as an Undergraduate Admissions Counselor at Texas State University. She sat on the Executive Board of the Texas Association for College Admission Counseling (TACAC) where she served as Co-Chair of the TACAC Government Relations Committee from January 2019 to April 2022. She is currently a member of the National Association for College Admission Counseling (NACAC) Learning Differences Special Interest Group. She is also the faculty sponsor for the WSSA Dungeons and Dragons Club and the Winston chapters of the Junior Beta Club, National Beta Club, and National Honor Society.

Amanda Stubblefield, M.Ed.



Education: Mrs. Stubblefield received her Bachelor’s of Arts with a major in English Language Arts and Reading and a minor in Health and Wellness Promotion from Texas State University. In 2021, she received her Master's in Special Education with Educational Diagnostician certification from Lamar University.

Expertise: Mrs. Stubblefield serves as an educational diagnostician at Winston. In addition, she supports Upper School students with dyslexia. This year marks her 17th year in education. Before joining Winston, Mrs. Stubblefield served as a Dyslexia Specialist in Boerne ISD (4 years) and Pasadena ISD (3 years). Prior to serving as a Dyslexia Specialist, she taught middle school and high school English Language Arts and Reading in Fredericksburg ISD, Crockett County Consolidated Common School District in Ozona, TX, and Pasadena ISD in Pasadena, TX.