The Acrostic Poem is such a good activity to keep in your back pocket for those rare times that you need to have a great activity to fill in some gaps in time.  It also works well as a stand alone activity, but I've seen it best used as a filler.  It still results, when done well, in a great way for the students to extend their understanding and knowledge. 

The Behavior Intervention Plan is discussed and a brief overview is given. 

Here's a helpful article: How to Create an Effective Behavior Intervention Plan