The Circular Classroom is a social enterprise committed to creating net-zero classrooms in Singapore. We aim to reduce greenhouse gas emissions and waste generated in the education system. As a start, we focus on textile waste and find creative solutions to reuse, repurpose and recycle pre-loved school uniforms. We collaborate with schools at all levels - Kindergartens, Primary Schools, Secondary Schools, Junior Colleges, Polytechnics and Institutes of Technical Education - as well as community stakeholders and organise experiential, hands-on learning programmes for students and lifelong learners to co-create new products made of pre-loved school uniforms. Through our work, we not only advocate for a more sustainable lifestyle, we foster community engagement and demonstrate that everyone can play a role in contributing to the SG Green Plan and Singapore becoming a zero-waste nation.