Summary : This session begins with sharing videos depicting a growing population of particles that motivate a problem and discussion about exponential growth with students. In this problem, students are given the "law of growth" and are asked whether it is exponential, and if so, to find its equation. We include a discussion with participants about how this activity might be facilitated in a grade 11 or 12 classroom. Podcast notes: Recorded Oct 2020, Chris Suurtamm is faculty at the University of Ottawa and Tweets at @Pi_Lab. Peter Taylor is faculty at Queens University and Tweets at @TaylorPeter77. More info and to find out how to register for Chris and Peter’s webinar on Nov 11th, 2020, can be found at https://talks.oame.on.ca/season-3