Start with simple Letters first, i write and read to her then i make her write and read to me, do it for like aweek(or 2 weeks), them your dear son will write & read by itself. (But i must be with him always)
If you are using Assisment books as school holidays homework for him is Good also, Lastime, when i first bought an New book for my dear daughter, i will not teach her 1st, i will put the book , colour pencil and pencil on the table dan i tell "Do it", then i will walk off, after 30-45mins i went back to her, dan i see her Level is until where by looking at her work, dan i wil correct her if is wrong and of cos if she did well...must say her "Wow, clever girl" <---(She like to listen).
For me, i will throw a New book to her 1st, see how can she do, WHEN WE ARE NOT AROUND , and correct her mistakes, dan she wil be more hardworking doing it, after afew time more she can do it better without my guide.
Hehe..This is how i teach my gal @ Home.