We recently finished reading Pobre Ana and Patricia va a California in my Spanish A and B classes. We were really crunched for time this year, so I didn't have as much time as I would have liked to pre-teach new vocabulary. Instead, my colleagues and I created Quizlets for each chapter and assigned them as homework. Before reading each day, we would play Quizlet Live (See this post for more details!) so that the students were incentivized to actually study the night before. It made reading a million times smoother and kids actually retained the words better than through regular vocabulary instruction and PQA. The great thing about Quizlet is that you can do the flashcards with sound. Here is how I ask my students to use it:
1. Go through the flashcards or list 1-2 times with the sound on so you can head the pronunciation.
2. Use one of the active study tools in Quizlet for as long as you need to feel comfortable with the words. This will differ per person.
I can't say enough good things about this product and highly recommend that all teachers try it!