The goal of the K-5 NGSS Resources is to provide information for each standard and sample resources for teachers. This set of resources is not intended to be complete for each standard. Instead, they are to provide opportunities for teachers to examine lessons that fit within the specific content of the standards. When possible, lessons that address the performance expectations are included. It is important to note that the performance expectations are the endpoints of instruction and require an understanding of the disciplinary core ideas described in the standard. Several of these resources require you to log into an organization's website. All of these websites are free.