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I like all the above ideas, and I can also suggest playing various games based on anagrams, also boggle, and other spelling games, such as fill in the blanks, hangman and many more.

Another things you can do is give only specific letters to your students such as all the consonants and the vowel A - then have them make up as many words as possible from those letters - cat, mat, pat, etc. This is perhaps too easy an example for your students, but by giving out groups of letters you can focus on certain sounds such as few, view and dew.
I think we learn through repetition - even if that means going over words ourselves alone - rather than through rules, so give your students plenty of practise and set certain words to be learned by heart.

Kind regards
Shelley
Fun English Games

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