STEMMIX provides a Project-Based Learning (PBL) curriculum for students at various levels of learning. We promote the building of foundational skills in STEM from Kindergarten to post-secondary education. The curriculum is built into a notebook that is interdisciplinary, hands-on, and is solely completed in a project style with no traditional standardized summative assessments. Growth is shown through students’ performance tasks, presentations, and application of the facilitator’s feedback.