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.
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.