I'm in the same boat as you are.. DS1 in year 4. Lurking around in the forum all the time to get ideas from other parents..
I 'try'(its so hard with daily commitments) to follow stevew61's advice:
1. Build up the foundation this year
2. Introduce the methods/techniques slowly.
So far, only doing the first. Making my DS read books, note down 'hard' words, make a list, ask my DS to look into the dictionary, write the meaning and a sentence to go with it. He thinks its so boring(especially to write it down), but, loves it when he can recollect the same word used elsewhere.. Looking into First Aid too, especially the categories(Groups of animals, Names of baby animals, Masculine/Feminine lists, etc). For Maths, we do Schofield and Simms - Mental Maths, one sheet a day(again, we're only 'trying'
). Slowly introducing new concepts in Maths, like, Fractions, decimals, conversion from one to another.
Still long way to go, and its so scary
. But, this forum is such a great resource, not just in terms of getting advice or useful information, but, also getting to know other parent's views and it keeps me going