I think it's worth practising phonics at home as well. I teach dyslexic pupils, and many of them don't necessarily get a phonic program at school, or if they do, they are able to 'get around it' by using visual memory skills instead (even if their spelling lists are very phonic based, they still manage to learn by memorising them as whole words). Later on, when it becomes too much to learn purely by visual memory, they have few phonic skills to draw on. Many dyslexic children will find phonics more difficult than sight word memory, and therefore need even more practise and overlearning.
The resources available at places like SmartKids can be very useful. Phonic readers like Supersonic Phonics and others are often better than the reading schemes used in some schools, as they really do follow a genuine phonic progression.
Private tutoring can be very helpful, especialliy past about Year 3, when they get a lot less daily phonics in school. In Key Stage 1, they do a lot of it in the literacy hour, but I find that after that, once most kids have got the basics, it really tails off, and some of the dyslexic children start to flounder more then when they are not still having all the sounds reviewed regularly.
It's good to get a habit of 'sounding out' established as early as possible, before children get in the habit of memorising ALL their spelling words (of course, there will still be sight words that need to be learned by memory, but at least if the phonic words are done by sounding out, the child isn't faced with trying to memorise everything, and thus starting to get overwhelemed by that).