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Meet Our Administrative Team

Theresa Fox

Theresa Fox


  • This is my first year at Mariposa, but my twenty-fourth year as an educator.  Throughout my  entire career, third-fifth grade has been my sweet spot.  I spent twelve years teaching in this grade span, and spent an additional seven years mentoring, coaching and leading upper elementary educators. Most recently I was a K-5 principal in Menlo Park City School District. I couldn't be more excited to join the Mariposa team this year!
  • I am particularly passionate about designing learning experiences that engage students and foster ownership, creativity, and collaboration.  I'm excited that we'll be back in-person with students and can infuse these kinds of experiences into daily learning.
  • In addition to being a principal and lifelong learner, I am also a mom. My two boys are in fourth grade and eighth grade, so I understand the parent side of raising a 9-11 year old, too! We live on the Peninsula and enjoy lots of baseball, hiking/biking, reading, cooking and family game nights.  

Gina Tosetti

School Secretary

  • This is my fifth year in the San Carlos School District. I started at Tierra Linda assisting in their front office and I'm now the School Secretary for Mariposa Upper Elementary. Although I've only been working on a school campus for a short time, I've logged many hours volunteering in my children's classrooms and on the PTOs for their elementary and middle schools.

  • I love staying active with my husband and children. We enjoy camping, riding dirt bikes, hiking and the beach.

  • I used to work for DreamWorks Animation and you can find my name in the credits of Shrek 2.