There are many websites that allow you to add voice narration to photos, slideshows, etc. But there are very few that allow you to narrate a whole collection of images with ease like Narrable does.
After you create an account, upload local images (or browse Facebook), then sequence and resize them into a scrolling collage. Honestly, this is the hardest part- reordering and resizing the images is a little more cumbersome than it should be. Once the images are in place, simply give your photos a voice by either uploading audio, using the built-in voice recorder, or enter your phone number for the voice recorder to call you and record by phone!
Each picture may have a different recording- and each recording is labeled with the person narrating. This allows groups of individuals to contribute to the same project! Here’s a curriculum example (thanks to my awesome and wonderful daughter who lent me her voice for a whole sentence in the narration).
The final project can be shared in a number of ways, including embedding using an iFrame as shown here (view Fullscreen for best results):