zoo our school were using the Oxford Reading Tree and have now moved to a different, unfathomable system that they seem to have made up themselves but obviously haven't.
There is a website for the Pearson books but I can't find a grid to show what levels they would expect a child to have reached by that age. Without that it is hard to tell if they are being helped enough or not.
We had massive problems with ds's reading until this year - he could read before he started school but the school wouldn't give him books with words in them etc. I kept maintaining that he could read but had a problem with the classroom and that if they took him on his own they would see what he could do.
It took 3 years but eventually his P3 teacher listened, took him on his own, and he jumped up loads of levels in his reading. He is now more keen to read for them in class because the level he is given is more interesting and challenging rather than boring because it is too simple.
The point of my story is that we gave up on the school really and taught him ourselves.
We stuck to the methods dd had used when she was taught at school and to the Jolly Phonics system that the school had been teaching him too but just made sure he read age/level appropriate books from the library and chipped away at it by ourselves.
I will go and look for your other thread. Hopefully someone there can find a chart or is a teacher and knows the system so can advise about the levels.