Sitting down to plan with students can help them to get out ideas or their own knowledge. They can let it flow while they have a scribe.
Mind map: http://app.mindmapmaker.org/#m:new
Plot Generator: https://www.plot-generator.org.uk/create.php?type=9
Story Starter: http://success-for-boys.tki.org.nz/Teaching-learning-resources/Story-Starters/Big-vs-Bigger
Story Starter: http://success-for-boys.tki.org.nz/Teaching-learning-resources/Story-Starters/Hooked-on-Danger
Story Starter: http://success-for-boys.tki.org.nz/Teaching-learning-resources/Story-Starters/That-Really-Stinks