This is an editable resource that will enable you to assess KS3 work. It is fantastic and is the best method I have come across in 15 years of trying to get the perfect assessment method sorted.
The resource contains an assessment grid and worksheets that the pupil work on to produce what will be assessed. There is a sheet for planning a design brief and specification on, a designing page and an evaluation page. The sheets are designed to be printed back to back so the work is done by the pupil on one side, and the assessment grid is on the other.
Pupils love working on the sheets and aim to get the highest attainment level they can.
The attainment descriptions can be changed to match whatever your school calls them, some schools still use levels, some use numbers etc.