My MA in Communications Management is from USC's Annenberg School, and
I found the information in this app invaluable, not only for my
writing students, but for my own edification as well. The structure is
well thought out and easy to follow and contains an amazing amount of
information in an extremely compact form. It has all the parts of
speech, myriad tests, word order, and tenses all presented in a very
user-friendly format. As an educated native speaker, I knew all the
verb tenses and how to use them. However, I wasn't always clear on
how to explain to my students the differences between certain tenses
and how they relate to each other. With the Verb Map, I can literally
point to any verb form in English and give an easy-to-understand
explanation.
And as serious as all this is, I had a lot of fun with the audio
recorder, listening to myself and comparing it to the model audio. I can see how
that would be quite beneficial to non-native speakers.
So if you have a predilection for American English with all its quirks
and glory, I would highly recommend this app.