Walking down the hall to class, you overhear your classmates, Molly and Johnny, having this conversation.

"Mrs. Schwartz really got us with that whole "broken time machine" scheme earlier this school year," Molly says.

"Yeah, she sure did," Johnny replies, "but I have to admit I really did learn a lot about the Native Americans. Can you imagine being the first people in the United States and not having to worry about any one bothering you? Living peacefully and enjoying the land around you?"

"Well, somehow more people got here . . . I wonder how?" Molly responds.

And with that Mrs. Schwartz appears in the doorway. She tells you to come into the classroom because that is the very topic of study for the day. As you enter the room.............there it is again! The time machine!!!