or
Look at this timeline. Select the event that happened last.
1,980
1,983
1,986
1,989
1,992
1,995
1,998
2,001
2,004
2,007
2,010
2,013
2,016
ref_doc_title.

Confetti

Jumping to level 1 of 1

Excellent!

Now entering the Challenge Zone—are you ready?

Teacher tools