My Son has just received his development folder from pre-school and the back page is split into the 6 key areas with a "phase of development" grade for each one - which are letters e.g. E, D-E or D. I've googled this to try and understand the grades but can't find it anywhere! I'm not worried as I'm happy that he enjoys pre-school and has fun whilst he's there, but I am a bit curious as to what they mean! Can anyone shed any light on this for me please?