Workbooks - Audios
The Warren Hardy Foundation Course contains four 160 page workbooks with hundreds of exercises gently layered together to guarantee retention. There are self correcting quizzes so you can monitor your progress.
You can buy the WorkBooks without the audio companion. However, if your goal is to speak and understand Spanish, then the audios become an invaluable companion to the WorkBook. The answer pages in the WorkBooks are recorded by native Spanish Speakers.
The process is to fill in the blanks, check your answers, and then listen to the audios first by reading with the WorkBook and then without the WorkBook.