Based on research and the progression of the disciplines, the 2020–21 Essential Instructional Content names the priorities in mathematics (K–8) and ELA/literacy (K–12) that should be the focus of instruction for educators in the 2020–21 academic year. These documents provides guidance for the field about content priorities by leveraging the structure and emphases of college- and career-ready mathematics and ELA/literacy standards. It is intended to help publishers, other designers of instructional materials, and instructional leaders find new efficiencies in the curriculum that are critical for the unique challenges that have resulted from school closures and anticipated disruptions in the year ahead, keeping at the forefront principles of equitable instruction that support all students.