I have recently been working on my final s, some of which should be pronounced as z. In this lesson, the final s in these words should be pronounced as z: experiences, hours, days, these, is, was, he's, she's, always, because.
You did really well, sis. Just a couple of them still sounds like s to me.
Here are a good video and an audio about final s:
http://www.youtube.com/watch?v=Wsv4TWhuuXY
http://www.englishpronunciationpod.com/podcast_44.html