Very similar to Reading Under Control but slightly lengthier due to the inclusion of lots of examples of the development of children's writing at all ages. Interesting, but rather intimidating in terms of the expectations of 'best practice'.
If you tried to provide all this book contains whilst individually working on plans to support SEN children, and teaching all other subjects at the detail and depth required, I think you'd either have a breakdown or need to be able to time travel to fit it all in!