The last big grammar topic we covered was the passive voice. I introduced it with an example in English about building a house:
We wrote the active voice sentence in German and then learned how to form the passive voice in German:
After a quick review of conjugating werden:
We wrote the passive sentence in German.
Finally, we discussed how to indicate an agent.
It was a pretty straightforward lesson, and my students were pleased that it used concepts (werden, past participles) that were already familiar to them. The biggest challenges for them were remembering irregular past participles and dative case articles and adjective endings.
Here are links to my notes handout for students, my powerpoint presentation, and passive worksheet 1 and passive worksheet 2.
Another great resource for passive is Tom's Deutschseite.