We make extensive use of exit polls in the classroom to support our formative assessment. They are a great tool for assessing where children are at the end of a lesson, are generally easy to mark and allow you to quickly make a judgement about the next lesson to teach.
Increasingly, we have also started adding some extra information on them so that they can be used for a further purpose. We have always been interested in how children's viewing habits have changed especially around online sites such as YouTube and have, with increasing frequency, been using online videos such as those provided by Khan Academy, to support home learning. If it is appropriate, we have started to add a shortened link and a QR code to an exit poll. This links to a video explaining some content from the exit poll.
Now, after marking, we can give the exit poll back to the child with their errors on and we encourage them to take it home and have a look at the video. At the moment, this is optional and some children do not bother. However, there have been occasions where, because they have watched the video or done some further work, the misconceptions have been corrected by the next lesson.