American English File: 4: iTools  (English, Digital, unknown)

American English File Second Edition retains the popular methodology developed by world-renowned authors Christina Latham-Koenig and Clive Oxenden: language + motivation = opportunity. With grammar, vocabulary, and pronunciation practice in every lesson, students are equipped with a solid foundation for successful speaking. And a new array of digital resources provides even more choice and flexibility. Students can learn in the classroom or on the move with Online Practice, iChecker, the Pronunciation App, and more.