Tioga Staff

NOTE: To contact an individual through EMAIL, simply click on their name.


Ryan Dutton / Principal

Credential: Multiple Subject, Single Subject Mathematics, Administrative Services Credential
College: Minnesota State University
Degree/Major: B.S. in Finance
Interests: Coaching, teaching, sports, camping, fishing, working out, giving back to the local community, family (wife Dawnelle teaches at Tioga, daughters Raygen, Reese & Remington), fitness and nutrition
Classes taught: Personal Finance, Weight Training/Conditioning, Landscaping


Dawnelle Dutton

Credential: Single Subject Physical Education, Administrative Services Credential
College: CSU Stanislaus
Degree/Major: B.S. in Physical Education / Kinesiology
Classes taught: Aerobics, Journalism/Yearbook at Tioga, Physical Education at Tenaya
Interests: Coaching Softball, teaching fitness classes and nutrition to students and adults, family (Tioga High Principal Ryan Dutton is husband, daughters Raygen and Reese), camping, working out, helping others and giving back to her local community in Groveland.

Tina Lanter

Tina Lanter

Credential: Single Subject Biology, Multiple Subject, Administrative.
College: Stan State, University of Phoenix in Lathrop.
Degree’s: Anthropology BA, MAED Masters in Education.
Classes Taught: Tenaya Parent Preschool, Don Pedro/ Eng11/12, Earth, Bio, Horticulture, Journalism, Lincoln: Honors Biology, Intro to Biology, Summers: English to Japanese Kids. Tioga – Env Sci, Bio, Chem, Ocean/Marine, Health, Coding/Robotics.  Club Advisor: Lincoln ACADEC, GSA
Interests: Travel. All Things Science (do science stuff all over country, even Mexico). All things kids! (spend all spare time with kids, grandkids, nieces, nephews, cousins from Sonora to Boston to Tokyo).


Sarah Graham

Credential: Single Subject in Visual Arts
College: Oregon State University
Degree/Major: Bachelor of Fine Arts
Classes taught: Art (both at Tioga and Tenaya)
Interests:  I discovered my love for teaching as a summer camp instructor, and that lead me to receive my teaching credential in art.  I’ve since taught as a student teacher at Summerville High School and currently teach art at both Tioga High and Tenaya Elementary.  My website is www.sarahannegraham.com, and I share my life with my husband Chris and our dog Hera.


Emily Hanchett

Credential: Single Subjects in English & History
College: University of California Los Angeles, University of California Santa Barbara, University of San Diego
Degree/Major: B.A. in Political Science, Master’s in Asian Studies
Classes taught: Economics, US History, World History, Academic Decathlon, English 9
Interests:  Family, animals, reading, writing, Asian studies. My two sons have been educated at Tioga, the oldest just graduated from CSU Humboldt in Forestry motivated in part by his experience taking Fire Science at Tioga and the youngest is a junior contemplating UC Davis. I’m proud of the education they each have received from our small but mighty high school.


Julia Keiter

Credential: Single Subject Mathematics
College: CSU Stanislaus
Degree/Major: B.A. in Mathematics
Classes taught: Math 1, Math 2, Algebra II, Precalculus, and Calculus
Interests: Spending time with my husband and two kids, camping, four-wheeling, and traveling.


Lynda Martinez

Credential: Single Subject English, Spanish, Psychology, Learning Handicap, Resource Specialist, Lower Math
College: National University – San Jose, Cal State San Jose, Cabrillo College – Aptos
Degree/Major: AA in Mathematics; BS in Social Sciences w/emphasis in Professional Education; MS in Special Education; MA in Leadership and Administration
Classes taught:CP English 10, CP English 11/12, Resource English, Spanish 1, Spanish 2, Spanish 3, Spanish 4, AP Spanish, Psychology
(also previously taught at Don Pedro:  Drama and Leadership)
Interests: My family (2 daughters — Maricela and Rosalinda), Reading, Writing, Raising Alpacas


Jimmie L. McClure

Credential: Pupil Personnel Services, Single subject Biology and Physical Education
College: CSU Hayward (now CSU Eastbay)
Degree/Major:  B.S. Biology, B.S. Physical Education M.S. Educational Psychology
Interests: Sports, coaching, Wildlife Rehabilitation, Sports Medicine


Karen Seals

Credential: Single Subject in Health Science
College: Concordia University
Degree/Major: B.A. Youth Development
Classes taught: Online, Culinary, Life Skills
Interests: Moved to Groveland in 2012 after teaching at Oakland High School, was Director of Public Health Academy and Friday Night Live while at Oakland High, Pickleball (heads the PML Pickleball Club in Groveland), teaching at Tioga.