Working within the education setting is constantly making me think up of ways to reinforce things thought and learnt. One method that seems to learn is to stick flashcards around the house. Words that have to do with the contents of the house eg: fridge, oven door, I stick the flashcard onto the item. Other words are stuck on a board in the room mostly frequented by the children. Although the words are not actually read out, just seeing them around helps them to unconsciously register them. This doesn't mean that the children will automatically start reading but it would help in reinforcing the word's spelling and meaning.
If you decide to try this out, expect comments from any visitors
I've been there and can't quite remember the number of times I had to give explanations of why all the words.
I know the house can end up looking like a giant billboard but in the long run I'm sure it's worth it.