68
Lesson 68 of 84 · Past, Present, and Future
Communication: Letters to Video Calls
Long ago, people got light from candles and oil lamps. Today we flip a switch and electric lights turn on!
Key Facts
1
Schools looked different long ago.
2
People used horses before cars were invented.
3
Some things stay the same through history.
Check Your Understanding
Question 1
1 of 2What is an artifact?