Zombies are alive and well in nature and have been for over 48 million years! Mind control is REAL!! I can't think of anything much stranger than zombifying as an opening activity for your Halloween lesson. (Except maybe frogs that come back from the dead).
Give students reading activity. While you take attendance, students read the Scientific American article, "Undead-End: Fungus That Controls Zombie-Ants Has Own Fungal Stalker." Students follow directions, complete the word puzzle, and are ready to discuss the article once attendance is complete.