Hi,
Just like me, my 7 year old year 3 boy has appalling spelling (and hand writing). School say no dyslexia (which i have diagnosed, and certain my Dad has undiagnosed).
Recent spellings have been tork (talk), sumthing and somefing (something, same page), howse (house), whent (went).
I'm not in the UK, but will be there for the 12 week summer holiday. Any suggestions of stuff to work on? School sent a booklet home over Xmas, which seemed to help temporarily, but was soon forgotten. And that is backed up by end of term spelling tests - random selection of 30 words from the terms spellings - about 7/30. But with a lot of effort we can get near full marks in weekly tests. We break down words into the seperate syllables, and build the word from there, and practice, practice, practice.
I'm currently trying to to get the 200 most frequently used English words correct, figuring that must be a good start. Other suggestions (that don't need me to be able to spell accurately!)