Just because you graduate doesn't mean the adventures are over...It's a semester break from college, and the graduates of Mr. Greene's time-traveling history class are home for vacation. However, where other freshmen may find themselves at the beach or parties, Mr. Greene convinces his alumni to make one more trip and help his current senior class learn the origins of the anti-slavery movement in the United States.With Nikola Tesla once again at the controls, Mr. Greene and his troop of students, past and present, soon find themselves caught up in the abolition movement. Samuel attempts to assist Harriet Tubman with a rescue mission in Maryland while the others cross paths with the likes of Harriet Beecher Stowe, Frederik Douglass and William Lloyd Garrison. Not to mention one extremely familiar young man destined for stovepipe hats...and the presidency.Abolitionists, slavery and a country turned upside down. Can the students make it home safely without altering...

History teacher Nathan Greene's plans for his students to hear Abraham Lincoln present his Gettysburg Address go awry when two ghostly historians secretly change the plans. Instead, the time-traveling classroom portable lands just before dawn on July 1, 1863, the first day of the Battle of Gettysburg. Greene and his students, Victor, Minerva and Bette, find themselves marooned in the tiny Pennsylvania town at the beginning of the pivotal battle of the Civil War.The intrepid group of time travelers must survive the battle and its aftermath until the classroom portable returns to rescue them. In the ensuing weeks, as they witness historic events, they also work as nurses, grave-diggers, and more—and find themselves in the midst of a war that doesn't just divide the country, but also their team. Victor soon encounters legendary notables such as Joshua Lawrence Chamberlain and Confederate General George Pickett, while Bette and Minerva cross paths with Union General George...

American history teacher Nathan Greene looked at his bulletin board. How did Benedict Arnold become the second president of the United States? And who the heck was Shippen Jefferson? Where were John Adams and John Quincy Adams? Shaken, Greene pulled down his map of the United States. He scanned the map: no major changes."Mr. Greene," Victor Bridges called out. "Tennessee is missing!'Greene's jaw dropped. Where Tennessee had once proudly been, there was now "Franklin."Had Greene and his high school students inadvertently changed history with their field trip to the Philadelphia of 1776? There had been no such repercussions the previous spring when Greene took his class to Ford's Theater for the fateful performance of "Our American Cousin" at Ford's Theater on the evening of April 14, 1865. That spring trip had been such a success that his students fell in love with history and begged for another trip for their junior year.But somehow the Philadelphia field trip had...