I have made a 44 page powerpoint of some sample captions that my fourth graders have written to pictures.
If you like this you can purchase my product: "Writing Dialogue and Captions to Pictures" and have your students practice writing captions and dialogue to pictures! This product is 225 slides long with a variety of pictures for students to practice wiriting captions to!
Every day I show my students three pictures and they write captions to the pictures. I pick the winning captions and add them to the powerpoint and show them the next day! Great for creative writing!