This is a great activity to teach students about the imperfect and the preterit, or to review at the end of a unit. It can be adapted to any language! Students investigate a crime scene in a fun and interactive way, which can be done all in the target language or partially.
This lesson gives you easy step by step instructions for the activity, the only thing you need is a large piece of butcher paper!
You can use this activity over the course of a few days or shorten it to one class period. My students LOVE this and many teachers have told me that their classes do to!