Charlie Anderson by Barbara Abercrombie. It's a cute story that will get your students questioning. Wednesday's Surprise by Even Bunting has an ending that many of your students might not see coming. A lot of Eve Bunting's books work well to model the questioning strategy, although many are more appropriate for upper elementary school students.
Having the question words at the top of the page, will assist students with writing their questions. Click here for a free copy.