This learning experience is organized around the principle that learning happens when learners’ own ideas are an active focus of the sense-making process. This is true for students who are presented with problems in their math class and being challenged to make sense of the problem, rather than being told an algorithm. This is also true for educators who are being asked to structure learning environments in new ways. This session discusses how one district has redefined what math class is, and how that new definition is framing the ways that students, teachers, and administrators are engaging in learning, including professional learning.This example serves as a focal point for experiencing what a modernized math classroom looks like, sounds like, and feels like. The session begins with a series of questions that encourage participants to reflect on their experiences as mathematicians. Many educators have not experienced learning environments that promote deep learning, therefore, it is important to create safe spaces where participants honestly reflect on how this discrepancy may impact their professional stance. We will explore what matters most in mathematics classrooms and we model how to prioritize deep and robust mathematical understanding. Modern math classrooms seek to both heal the traumas incurred from experiencing systems -- math education -- designed to sort learners, and establish new routines and practices that center deep and diverse problem-solving. There are a multitude of ways that one could approach the task of healing through teaching and learning, for this session we look closely at mathematics learning environments that allow student ideas to fuel the teaching and learning. We will highlight the ways that this environment supports learners to make their thinking visible, how learners revise their thinking in an iterative sense-making process, and how students use formal and informal mathematical language to communicate their ideas.