If you sometimes struggle to think of the right word at a certain time, My Word Coach is the best! You can play mini games to improve, you can look up words that are in the glossary, there's so much to do! Pick between 4 word coaches, that teach you in different ways. The only problem is that you need to have a stylus to play most of the games. :( But, apart from that, this game is one of the best games I've ever played! I hope that if you rent this game you'll like it as much as I did.
This game is fun. It helps you build a better vocabulary and IMHO would be great for middle- and high-school students as well anyone just interested in building their vocabulary. It keeps track of your progress and even gives you a "helper". Like I said fun and useful.