We try to give students as many different opportunities creating graph stories as we can. Two resources I use are Annenberg Learner Teaching Math module on representing mathematical stories and Dan Meyer's Graphing Stories. Illuminations also has a very open-ended activity in which students roll dice to get coordinates, connect those coordinates, and then create stories that go with the graphs. I recently found the Mars Shell Center unit on interpreting distance-time graphs; it will be useful for extra practice next year.
I've created a practice activity for students that could be used as homework or as a formative assessment activity. <It's no longer available.>
How do you provide reinforcing practice?