I'm hoping that you will see this post TheGruffalo2 as you helped me loads with my Year 2 Maths post 
DS (6, youngest in year, mild CP) was on orange band books at the start of year 2, and was noted to be below expected average at parents evening in October. Since then he has moved onto green and a couple of weeks ago, moved onto turquoise.
His teacher mentioned at parents evening that he had difficulty relaying what was happening in the text and couldn't answer questions when asked. She has more recently mentioned that he has a great ability to do that now and will answer questions about what he has just read.
So I'm wondering, is turquoise level usually about right for this age? There are some very advanced readers in his class so I know there are others who are way ahead, but to me he seems to have made great progress since the start of the year.
Also, what would he be needing to do to move up onto purple?