iBoard is a site full of fabulous resources for teachers and Start with a Character and Start with a Setting are great ones to use for starting story writing.
When students are struggling for a main character to write about, Start with a Character can help to give them a little inspiration. Students can choose a face, an expression, and an outfit for their character. Outfits include: cowboy, caveman, pajamas, astronaut, camper, underwater diver, beach boy, and knight. For students struggling with spelling, you can also add a label to any item on the screen.
When students are struggling for a setting for their story, Start with a Setting can help them to choose one. There are nine settings including: movie set, beach, space, castle, forest, ranch, underwater, mountain, and plains. Once you choose your setting, you can choose many different items and characters for your setting.