NSEAD (National Society Education in Art & Design) has published assessment & progression guidance for art, craft and design for Year 1 to Year 9 to replace Levels.
I am lucky enough to have worked on the document as part of the assessment expert group. It has taken us a long time to produce, and the leaders of the group; Dan China and Ged Gast have done a brilliant job.
You are free to download them and use them in your classroom. They will make assessing in a level-less world a breeze!!