I use the Pie Corbett Storytelling technique where the children make up the parts of a story with me as a class, we print up picturesand we add actions to help us remember it. We retell it every day . Then I ask them to change something about the story and tell it to a group (the setting the main character the problem etc. I then use small world play as an ideal place for consolidating the changed stories. So over a 2 week period we " make the story, learn and practise the story, change the story, play the changed story, draw the paragraph/sections or storyboard, write the story". Its alot of input time, and each lesson would focus on one aspect, like describing the setting/action words/puctuation etc, but the resulting stories are so much better than they were able to write before, so its worth the effort.