The new science standards were implemented by Arizona in 2018.  These standards follow A Framework for K-12 Science Education.  Arizona is not a NGSS state, but the Arizona standards are similar with a focus on three-dimensional instruction which includes Science and Engineering Practices, Crosscutting Concepts and Core Ideas.  The major difference between the AzSS and the NGSS is that Arizona uses an additional research document, Working with Big Ideas of Science Education, in their development of the Core Ideas of Knowing and Using Science.  Here is the research Arizona Department of Education utilized to develop the 2018 Arizona Science Standards. 

A Framework for K-12 Science Education.pdf

Working with Big Ideas of Science Education.pdf .pdf

Accessibility Version Vertical Progression of Knowing Science 4_3_19_0.docx