How did timepieces evolve over time? Humans have gone from watching the sun rise and set to watches with computer chips:) It seems that time has come to play an integral part in everyone's day to day activities.
When teachers have students research inventions, they may want to have students take a look at this site. This site takes them from ancient calendars to atomic clocks and MORE. Why not encourage students to expand their research to also include how different cultures view time (ex. What is considered ON TIME in different cultures? In the US, people generally arrive at parties fashionably late rather than be exactly on time).
EVOLUTION OF TIME MEASUREMENT OVER THE AGES This is another site that is worth bookmarking for future reference!