Make: iMovie 

Photos for Class is a great option for finding images because it gives the source information on each photo you download.

Be sure to select movie NOT trailer.

Some tips for adding your audio.  You can add it and delete it as many times as needed, but one of the best strategies is to just record one or two sentences at a time and add them in.

This way you don't risk reading four or five paragraphs and messing up at the end!

You can adjust your photos to be longer or shorter based on your audio.  You might also want to check into the Ken Burns effect and different filters.

Before you finish up your work you might also want to explore adding themes, transitions between images and music.

You'll also want to be sure to share your sources for your photos and your  name.