This document discusses how two librarians at the University of Toronto, Elena Springall and Navroop Gill, collaborated on instruction projects to support undergraduate students at scale. They piloted projects in architecture and math courses. For a first year architecture course, they provided a lecture, trained teaching assistants, and led tutorial sessions. Feedback noted improved citations but opportunities remained. For the second iteration, they extended TA training. Outcomes included increased capacity and strengthened faculty-library relationships. The librarians emphasize the value of collaborative reflection to continually improve instruction through experiences sharing, critical feedback, and assessing community needs.