One way to support literacy is to create listening centers in the Target Language (TL). This takes some initial set-up, however once the books are recorded they may be used as often as desired. My library collection consists of many picture books because I teach in an elementary school.
The Internet has many books pre-recorded. A quick search can save you a lot of time on having to record the book yourself. If I can't find the book online, I record the book on my Mac computer using GarageBand. (There are many programs on Macs and PC's that can be used; iMovie, Photo Booth, Audacity.) At each page-turn, I added a "ding" for those emergent readers to help guide the students as they follow along. Once I have finished recording/editing, I need to save the recording so my students may access the file on various devices. I have a folder in my iTunes account and "sync" the books to iPods that I purchased for my classroom.
YouTube has a very nice video of ¿Eres mi Mamá? por P.D. Eastman. I recorded the sound from this video onto GarageBand and exported into an mp3 file. It took a total of 10 minutes to record the book, download into iTunes, and upload onto my student iPods.