In2science is an innovative, award-winning and proven multi-university schools partnership program that is helping to address the decline in STEM participation in Victorian high schools. We use the power of mentoring relationships to increase Year 7-10 students’ enthusiasm for science and maths, to improve student engagement, and to build aspirations for further STEM study. Since 2004, our volunteer university mentors have worked with over 58,163 students across 2,485 semester-long placements in Victorian STEM classrooms (including 276 placements in 2018). We currently work with over 65 metropolitan and regional partner schools, the majority of which are low SES. Our mentors are trained to share three key things with their student mentees: their love and passion for STEM; their experience of studying STEM from high school through to university; and their up-to-date discipline knowledge and study skills. In doing so, they act as learning coaches, STEM role models, and mentors, working together with the teacher to complement curriculum delivery. Several external evaluations of the program demonstrate the positive impact on each group of participants: school students; teachers and schools; and university mentors. Our priorities are ensuring a significant positive impact for school students, enriching STEM education in school communities, and providing professional development across key graduate attributes for our volunteer university mentors. Find out more about our school, university and funding partners at https://in2science.org.au/about/partners/ Meet our mentors at https://in2science.org.au/category/profiles/ Meet our team at https://in2science.org.au/about/people/ Meet our Advisory Board at https://in2science.org.au/about/advisory-board/