The Thinking With Algebra (TWA) curricular materials is unique primarily because of its focus on algebraic structure and how it is presented to instructors! The curriculum materials provide a lengthy discussion on the theoretical aspects of structure. A key point is that algebraic structure is often implicit, as experienced algebraist we often do not see the underlying structure which students do not see. Our goal is to make algebraic structure explicit to instructors and they in turn make it explicit to students. Each activity has notes where structure is frequently highlighted. These notes help instructors provide opportunities to learn algebra topics with consideration of algebraic structure. By making algebraic structure explicit, students have an opportunity to learn about algebra from a different perspective, particularly helping students who have struggled with algebra.