Meet the 2025-26 Student School Board Members

Three Seattle Public Schools students were sworn in as the 2025–26 Student School Board Members on Aug. 27. Representing West Seattle, Roosevelt and Ballard high schools, these student leaders bring a powerful blend of experience, advocacy, and vision to the board.  

Senior Sabi Yoon, now in her second term, joins fellow senior Isabelle Massoudi and junior Josephine Mangelsen in championing educational equity, inclusive policies, and student voice. Together, they aim to elevate mental health support, sustainability efforts, school safety, and equitable access to resources across the district—ensuring that every student, regardless of background or pathway, is heard and empowered. 

Meet this year’s School Board student members:

Josephine Mangelsen, West Seattle High School and Skills Center Careers in Education 

Josephine Mangelsen brings a unique blend of classroom experience, leadership, and community engagement to her role. 

The junior is the vice president and co-founder of her school’s Jewish Student Union, where she fosters inclusion and cultural awareness. Her passion for educational equity and student voice led her to join the Seattle School Board, with a mission to drive meaningful change through leadership and connection. 

Through her Skills Center program, Josephine interned in a kindergarten classroom at John Muir Elementary, an experience that deepened her appreciation for the dedication of educators and the importance of nurturing school environments. She believes in amplifying the voices of those often unheard—especially younger students and marginalized communities—and is committed to bridging the gap between decision-makers and the diverse student population they serve. 

Josephine’s priorities include: 

• Elevating Career and Technical Education (CTE) and promoting non-traditional educational pathways as valid and valuable options. 

• Uplifting underrepresented voices across the district, including those marginalized by race, gender, sexuality, religion, ability, or age. 

• Empowering younger students to be seen as thoughtful advocates and contributors to school culture and policy.

Isabelle Massoudi, Roosevelt High School 

Isabelle Massoudi is a dedicated student leader at Roosevelt High School, where she serves as President of multiple clubs including Envirothon, UNICEF, Neuroscience Club, and HOSA. She is also an active member of DECA and the Speech and Debate team. Through these roles, Isabelle has demonstrated a deep commitment to advocacy, academic excellence, and community engagement. 

As a student member of the Seattle School Board, Isabelle is passionate about amplifying student voices in district decision-making. She is especially focused on issues of educational equity, mental health, sustainability, and creating inclusive pathways that prepare students for life beyond high school. Her goal is to ensure that all students—regardless of background—have access to the resources and support they need to thrive academically, emotionally, and socially. 

Isabelle brings a thoughtful and inclusive perspective to the board, striving to strengthen equity across schools and promote policies that reflect the diverse experiences of Seattle’s student population. 

Sabi Yoon, Ballard High School 

Sabi Yoon is a passionate and driven senior at Ballard High School, where she serves as Founder and Team Captain of the Mock Trial Team, Captain of both the Varsity Swim and Tennis teams, and News Section Editor for the school newspaper. Her leadership across academics, athletics, and journalism reflects a deep commitment to service and advocacy. 

Now in her second term as a Student School Board Member, Sabi brings a strong student-centered perspective to district decision-making. She is dedicated to addressing key issues such as school safety, the nutritional quality of school lunches, equitable funding for under-resourced programs, and fostering inclusive environments that reflect the cultural diversity of Seattle’s student body. 

Having experienced firsthand the challenges students face, Sabi is committed to ensuring that student voices are not only heard but actively shape policy. She continues to build on initiatives started by previous cohorts, including expanding engagement with students across high schools and strengthening collaboration among Associate Student Bodies to drive meaningful change. 

Sabi also advocates for restructuring SPS Policy 1250 to improve the experience and impact of future Student Board Members. Her vision is rooted in equity, representation, and opportunity—ensuring that every student, regardless of background or financial means, has access to a well-rounded and supportive educational experience.