This post is adapted from the class blog of Lynne Crowe who teaches Year 8 in New Zealand. Students are often concerned about about their spelling ability so when I read about SpellingCity from The Tech Savy Educator, I thought it would be useful to post it here. Maybe you could start using it and let us all know if it helped you.
She says "I found at least 5 reasons that this site is could really lend itself well to improving vocabulary.
1. Play a Game - After typing your spelling list into the boxes it provides (you can add as many boxes as you need), you can play a spelling game in which every word is given with its pronunciation and used in a sentence. NOT textually, but verbally; actual people have made actual recordings of the words you put in, so you can click on a button and hear a human voice say the word, and even hear them use the word correctly in a sentence, very much like a spelling bee. If you get words wrong, you can always try the "Teach Me" button, and the site will spell out the words you missed while also giving you the sentences they're used in.
2. Share Spelling Lists - The site is completely free (which is awesome), and teachers can create their own accounts to create and share lists with their students. You can create as many lists as you want, and students can find them easily without having to have a login. They simple have to type in the first or last name of the teacher or the name of the list, making it simple for them to find lists. Once they've found a list they can take a test, have the list "taught" to them with a review, play the game, or print off the list to work with it in the real world.
3. Lists of the Month - If you're a competitive type, or just want some recognition for your wickedly difficult spelling lists, you can nominate your list(s) for "List of the Month." When I checked the most recent lists, I found vocabulary words from the first chapter of "Lion, the Witch, and the Wardrobe", soccer terms, and 3rd grade homophones.
Apparently, there's more in store for the website, with more games coming online in the near future. With just the one game, I can see how students might quickly become complacent with the repetitive recordings; clicking on the sentence or pronunciation button yields the same recording each time. This is definitely a site worth checking out for elementary and middle school students."