Here are some prompts you could try at home when your child needs help to solve a word. (From http://www.choiceliteracy.com)
Get your lips ready– e.g. Ben can cat__ the big red ball. (1st part of word and reading on. May then be enough information to predict the whole word.)
Stretch it out– e.g. r-e-d / red
Chunk the word– e.g. c-at-ch / cat-ch / catch
Skip it, hop back– e.g. Ben can ______ the big red ball. (Leave out the tricky word. Read on to end. Go back to the start of the sentence and try again with more meaning known.)
Flip the vowel– Vowels (a e i o u) can be said different ways. Sometimes the student will need to try more than one way of saying the vowel within a word, before he or she can hear a word that would make sense, e.g. a can have the short sound like it has in catch or it can have a long sound like it has in made.