Tap the yellow button to hear each word. Type it on the line, then check.
Tap again to hear it as many times as you like.
One word per line. Add a sentence after a dash and it'll be read out between the two repeats, just like in class.
Without a sentence, the word is simply said twice.
To update next week's words: edit words.txt on your website (GitHub's web editor works from a phone), then reload the app on the iPad.