Personally, it seems like no matter how hard I try, I can never hear my students read enough. I also was thinking of a quick and easy way for students to hear themselves read. So, I showed them how to use the Voice Recording application on my iPhone. I also laminated this instruction sheet so they could use it independently:
As their fingers whizzed around my touch screen, I would be conferencing with other students, doing other assessments or circulating around the room...while they were collecting oral reading samples for me, convenient! Also, it is a natural and non-threatening read-a-loud activity that even more shy, reluctant readers participated in with enthusiasm. They would just find a quiet, private corner and go for it, no need to worry about an audience. Some children were very adept with the iPhone since their parents already had one. In fact, I suspect they know how to work it better than I ever could.
For something more formal and uniform, I would supply students with a fluency passage according to their reading level. Here is one that I got from Reading A-Z. You will hear me mention this resource a lot because it is AMAZING. It is a reading resource site you have to pay for (completely worth it...a bargain!) but I have included one of their free samples here. Hopefully, I am not breaking any laws by putting this here!
Here is a sample of a recording from my iPhone. Even with the chatter in the background, the sound quality is very clear. It is a fluency passage from Reading A-Z, but not the one shown above. I had the students state their name before recording.