Some of us do and some of us don't.
Teach our kids to Read and Write in English that is.
But for those of us that do, or want to, here are the materials I have used without wanting to throw them against the wall and express buyer's remorse in very stroppy terms.
For early phonics work
Starfall.com, which is free.
Focus on comprehension (nelson thornes) PLUS TEACHERS BOOK
Focus on writing composition (nelson thornes) PLUS TEACHERS BOOK
The teacher's books are what set these books apart, they really do make the difference. I would expect to spend about a week on each unit even if doing some input everyday, There are so many off-shoot activities included and described. The work is staged to set the child up to succeed rather than throw them in at the deep end and hope they don't sink.
As for level, I started Son of Thor on book one, at nine years old with a grounding in phonics and an ability to decode as well as most sight words under his belt. He learnt to read in English by himself and behind my back but I wasn't too sure of the level plus I wanted to build his confidence and that meant giving him work that he felt he could do. We went through the first book at quite a rate and we are now on book 2 which we are taking more slowly. If you child has had little input WRT reading and the English alphabet I'd start lower with the starter/introductory books no matter what age they are.
If you aren't sure where to begin or are short on time I suggest getting only the reading comprehension book which contains plenty of opportunities to transfer the skills over to writing.
For Grammar/ How language Works
Pupil Book (nelson grammar)
We are now on book 2, we started with book one, and I am glad we did. Again I suggest you take it slow, particularly if the smallie is reacting badly to a very picky teacher at school who is a bit too ready with the red pen and short on noticing what people did get right.
I do use other materials, but those are the best of the bunch as far as I am concerned.