Our mission is to inspire and develop courageous leaders who think independently, work collaboratively, learn joyfully, and champion change.


At Seattle Girls’ School, students develop a sense of the big picture, connecting academic studies with current events, self-awareness, and collaboration. This results in confident, highly qualified graduates who succeed in high school, college, and beyond.

Middle school is a critical time for development, especially for girls. As girls reach early adolescence, their self-esteem and interest in certain subjects is likely to plummet as a result of being bombarded by conflicting messages about femininity and achievement.

Seattle Girls’ School combats the trend of girls losing confidence before competence, especially in the areas of science, technology, engineering, and math. Our project-based curriculum—grounded in real-world experiences—offers endless opportunities for leadership, collaboration, and problem solving.

We invite you to witness what countless visitors to our campus experience: poised, confident, and actively engaged students. When reflecting on their educational experience, our alums often attribute who they become and what they achieve to the transformative experiences they had at SGS.

A Letter from our Head of School, Brenda Leaks

Welcome to Seattle Girls’ School!

During middle school, every interaction your daughter has during the course of her day shapes her future. Our alumnae, when reflecting on their educational experience as a whole, often attribute who they become and what they achieve to the transformative experiences they had at SGS – their middle school!

Founded over a decade ago by several Seattle families who wanted an exceptional school for their daughter, SGS has innovation built into its mission. That innovation is rooted in making all programmatic decisions on how girls thrive. We have always believed that the ultimate outcome of an SGS education is an academically capable and confident young woman. Ultimately, we seek to …

… inspire and develop courageous leaders who think independently, work collaboratively, learn joyfully, and champion change.

Our mission is our promise, and it is readily apparent in our hallways and our classrooms every day. Visitors to our campus often remark how unusually poised and stunningly confident SGS girls are. SGS makes certain that every member of our diverse student body gains mastery of core competencies essential for success in high school and well beyond.

An SGS student takes full ownership of her own education; she learns to stand out, stand up, and stand together with her SGS sisters. She is always glad to have the opportunity to talk to prospective students and parents about what makes her school a place for being both scholarly and joyful. I invite you to visit our campus, to get to know our community, and to see for yourself all that can be possible at Seattle Girls’ School.

All my best,
Brenda Leaks
Head of School

Why Choose a Girls' School?

Middle school is a critical time in the development of girls. It is in these crucial years that, more often than not, girls are directly or indirectly dissuaded from certain areas of study, pressured to make decisions they later regret, and feel powerless in charting a course for future achievements.

Research has shown again and again that girls at single-sex schools flourish academically. Graduates of girls’ schools are more motivated, more accomplished, and have higher aspirations than their peers at coeducational schools. They will typically score 30% higher on SAT tests than the national average for girls.

None of this research is a surprise to us. We know when girls feel safe and challenged, they are more willing to explore their strengths and examine areas for growth. We know they are more likely to develop a healthy self image, which means they’ll be less likely to take unhealthy risks and will feel more empowered to pursue their dreams.


Explore the following resources for more information:

  • The research of Dr. Joan Deak, SGS Advisory Board member, who provides hard data on How Girls Thrive
  • The website for the National Coalition of Girls’ Schools where you can review The Case for Girls Schools.

Why Middle School Only?

Middle school needs to be so much more than a stepping stone on the way to high school. At the end of your students’s middle school experience, she will not be the same person she is today. Families are likely to revisit their school options in eighth grade because of how much their daughter will grow and change over the course of the middle school years.

We embrace the potential of this stage by framing our curriculum around things that are incredibly important for a middle schooler, like identity development and leadership. This age group is seldom respected as the capable learners and change-makers they can be.

With our expertise on how middle school students learn and develop, we work with their developing senses of justice and right vs wrong to help them grow skills to advocate for themselves and others. Choosing a school that’s just right for your daughter at this stage in her life is extremely important. Our curriculum is tailored to support the learning and development of middle schoolers to set them up to succeed.



Northwest Association of Independent Schools (NWAIS) – www.nwais.org


• National Association of Independent Schools (NAIS) – nais.org

• National Coalition of Girls’ Schools (NCGS) – ncgs.org

• Northwest Girls Coalition (NWGC) – nwgirlscoalition.org

• Online School for Girls (Charter Membership) – onlineschoolforgirls.org

• Puget Sound Independent Schools (PSIS) – pugetsoundindependentschools.org

• Washington Federation of Independent Schools (WFIS) – wfis.org

Seattle Girls’ School does not discriminate on the basis of race, national or ethnic origin, sexual orientation, or family composition in administration of its educational policies, admissions policies, employment policies, scholarship and loan programs, and athletic and other school administered programs. Seattle Girls’ School admits female students, regardless of the gender they were assigned at birth.

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