singersgirl - I think that's where I differ from the teachers on this thread. I don't see why any child "should" be able to decode nonsense words. Decoding is only useful (and it is very useful) inasmuch as it enables the understanding and reproduction of real language in print.
This is where I think that some of you aren't listening to what the teachers on this thread are saying.
The great strength of learning letter/sound correspondences is that it enables a child to attempt to independently work out any unfamiliar word that they encounter. They may need to be told which 'sound' alternative of a particular grapheme is appropriate in a particular word if they do not have that word in their receptive or expressive vocabulary, but that is a spoken language problem. but they can confidently have a go at anything they encounter.
If the word is not in their receptive or expressive vocabulary then it is, to all intents and purposes, as much a nonsense word as are the nonsense words in the screening check because it does not convey any meaning to them.
With the best will in the world, there is no way that a 5 or 6 y old, however advanced their reading and vocabulary skills may be, will know the meanings of all the words in the English lexicon. To give them the impression that every word they encounter is a word that they 'know' is, at this stage of their reading and vocabulary development, illogical, and can lead to children trying to make an unknown word into a word that they know. I encounter a great many children at KS3 who try to do precisely that. It makes what they are reading incomprehensible to them and prevents them from acquiring new vocabulary (they never try to find out what unfamiliar words mean because they have made the 'unfamiliar' into familiar and don't even recognise that it is a word that is new to them).
Someone,much earlier in the thread, posted the words of a nonsense word poem. How do these parents who strongly believe that children shouldn't be given nonsense words to read cope with nonsense words encountered in reading poems such as this? Or do they steer clear because the poem has no 'meaning?
bonsoir thinks that the check should comprise longer and longer words. Why? Most children at that age aren't expected to be able to decode complex words. Reading long words tell us nothing more about their knowledge of letter/sound correspondences and decoding and blending than short words do. It 'tests' a different skill, that of being able to decode and blend longer words.
All that the Phonics Check is intended to do is to check that children have been taught the correspondences which they are supposed to know by that stage in Y1 and have been taught how to decode and blend to produce a word. It is intended to check that basic skills are in place, not advanced ones.