Oh goodness, the 45 HFWs! That list was supposedly phased out 7 years ago, but a quick google confirms that they're still being heavily promoted!
I go come went up you day was look are the of we this dog me like going
big she and they my see on away mum it at play no yes for a dad can he am all is cat get said to in
No brainers: in, went, up, this, dog, big, and, on, mum, it, at, yes, a, dad, can, am, cat & get. He should have covered all the sound spellings for those. There are 18 out of the way...
Can any child not spell 'I' and 'a'?
Group: he, she,we & me; go & no (might as well do 'so' at the same time); day, away & play (could add in some more 'ay' words while you're at it). Do 'come' with 'some'. 'My', add words like fly, cry, try, by as well. 'See' with tree, three, bee. 'For' with sort, short, port (ships, not the drink!) 'Was' with want, wash, wasp,
'Look' with cook, took, crook, shook
The idea is to show that there is nothing at all unusual about the spelling of these words.
'you', they, all, said, of & to are all a bit more unusual.
'ou' as /oo/ can be found in soup & group so you might want to do them together
'ey' as /ay/ comes in grey & prey, maybe worth teaching if they're words he would use.
'All' is a funny one - it sounds like /or/ /l/, the /or/ is spelled 'al' the /l/ is the final 'l'; same in words like tall, ball, small, hall, call so might be worth teaching them as well.
'Said' sounds like /sed/ - the ai spells the /e/ sound. (May be found in certain, curtain, mountain, according to accent, but they're a bit advanced...)
'Of' - unique (?) with the 'f' spelling a /v/ sound.
Oh, and 'going' - 'go' with 'ing' on the end.
The more I look at that list the more ridiculous it seems. Most of the words are only there because they were used in repetitive 'Look & Say' reading schemes. You only have to look at 'normal' text; what is 'high frequency about mum, dad, look, cat, dog? I can go for days without reading them in text!
I have had teachers, seriously, tell me that these words aren't decodable...
OMG, this looks like one of masha's lists 