Thanks. Yes, the words you answer correct repeat progressively after 15 words, then 150 words and then 500 words (just to be sure it doesn't slip off your memo

Thanks. Yes, the words you answer correct repeat progressively after 15 words, then 150 words and then 500 words (just to be sure it doesn't slip off your memory). Perhaps I need to way to determine if a word is already known versus if a person has just learnt it.