Do you know why it's called a watt? an ohm? a volt? Your students will know after this thorough history. From amber and fur (600 B.C.) to jumping frogs (1786) to electrical resistance (1827), this unit is a fantastic introduction to the history of electricity.
A poster explains simple electrical circuits; this is followed by a clear, detailed reading comprehension exercise; practice work for drawing in missing wires to complete the circuits concludes the lesson.
This unit is a full series of reading comprehensions presenting a thorough view of cell phones in terms of history (when was it invented) techonology (how does it work), society (what are appropriate cell phone manners), and more.