The purpose of this resource is to help math teachers unpack, understand, and implement the current math content and practice standards. It describes the progressions of learning within each course and provides content supports that include broad ideas about effective instruction as well as practical instructional strategies. Math teachers, coaches, and leaders are encouraged to use these materials collaboratively to support ongoing instruction and the growth of individual teaching practice. The content is organized by the following topics in Algebra I, including: (1) Standards for Mathematical Practice; (2) Algebra I: Number and Expressions; (3) Algebra I: Functions; (4) Algebra I: Linear Relationships; (5) Algebra I: Systems of Linear Equations and Inequalities; (6) Algebra I: Quadratic and Exponential Relationships; and (7) Algebra I: Data Analysis and Statistics