Many of the words listed as ‘example words’ for years 1 and 2, including almost all those listed as ‘exception words’, are used frequently in pupils’ writing, and therefore it is worth pupils learning the correct spelling. The ‘exception words’ contain GPCs which have not yet been taught as widely applicable, but this may be because they are applicable in very few age appropriate words rather than because they are rare in English words in general.
The word lists for Year 3 and Year 4 and Year 5 and Year 6 are statutory. The lists are a mixture of words pupils frequently use in their writing and those which they often misspell. Some of the listed words may be thought of as quite challenging, but the 100 words in each list are taught within the four years of Key Stage 2 alongside other words that teachers consider appropriate.