
Teacher training
as it should be


The problem
Transforming education depends on what happens in the classroom.
If we want to change education, there is no shortcut: everything depends on what teachers do with their students, every day, in thousands of classrooms at the same time.
That is the real challenge: training and supporting millions of teachers, in Chile and around the world, in a way that is deep, practical, and sustainable. Today, this problem remains unsolved.
About Circles
At Circles, we design and run teacher professional development through live, small-group sessions with colleagues.
Together with TeachView, Circles makes it possible to scale teacher learning with strong pedagogy, rich feedback, and personalized support.
As a software development company, we build the platforms that allow us to deliver this experience at scale and at a cost comparable to traditional online courses.
Every story begins with a small spark
2010
Debate teacher at Instituto Nacional
Hi, I'm Sebastián Marambio. In 2010, I created a Model United Nations–style debate club at Instituto Nacional of Chile. I ran it as a fun after-work project (at the time I worked in Government). For three years I supported students from Instituto and later from Carmela Carvajal as they competed in an international tournament. I saw how the experience changed their lives—and mine. That's when I fell in love with education.

2013
Summer Academy is born
With that spark, my Harvard friend David García and I created the Summer Academy. We borrowed Instituto Nacional during the school break to build our own alternative school. Students chose courses ranging from 'Mars Colonization' and 'Physics for Future Presidents' to 'Ornithology and Theater.' We learned that all children and young people love learning when there is a good course, with solid pedagogy, and a teacher who is passionate about what they do.

2016
Aula 42: teacher training
Many schools asked if we could help them bring the Academy courses to their own students. That's how Aula 42 was born: a training program so teachers from any school could teach these courses themselves. We designed the materials, trained teachers, and supported them during implementation. We began testing how to scale great learning experiences without losing quality.

2018–2022
Innovation Center and the pandemic
Together with a remarkable team, I had the fortune to lead the transformation of Enlaces into the Ministry of Education's new Innovation Center. During that time, the pandemic hit and, with partners like Google and Microsoft, we deployed nationwide training on digital tools for remote teaching. Thousands of teachers enrolled, but only about 4% completed the courses. They were self-paced courses with excellent content—but click-based learning has very low impact.

2022–present
Circles
Together with my co-founder and friend Aanu Olakunle—a brilliant developer and person, originally from Nigeria and now based in Sweden—we brought to life our vision of a new way to deliver education at scale: one that preserves the connection between peers, an undervalued yet fundamental ingredient of powerful learning experiences.

2025–present
TeachView
For years, after every teacher-training program, the same questions lingered: 'Does it actually work?', 'Does anything really change in the classroom?' TeachView was born to begin answering those questions: using AI to analyze what happens in lessons and give teachers and school leaders simple, actionable evidence about their practice. For the first time, thanks to the LLM revolution, we have a real way to connect teacher training with what happens in the classroom. Over time, an extraordinary team has joined this mission—people who share our commitment to education and who are building what we believe is the best teacher-development tool out there.

Stories that drive educational transformation
Success stories and trends in education.



