Study in a DS classroom, where each student has a DS that is connected to the teacher's computer. Students take multiple choice tests in vocabulary or spelling and complete exercises.
Study independently. Games such as My English Coach and Word Coach encourage self-study while increasing vocabulary and pronunciation. Both games have built in dictionaries with up to 17,000 English words.
Increase word recognition and brain power. The game called Brain Age claims to increase your mental agility. Timing yourself with either the word scramble or word blend game increases speed and knowledge of vocabulary and spelling.
Play multiplayer games. Competition not only increases speed and mastery of the English language, it increases your motivation to learn. Word Coach, for example, has five multiplayer games that are wireless and link Wii to the DS system.