Students will use the Centennial Mirror poster from the 1876 World's Fair to discuss how technology changed in 100 years. This activity includes a short writing activity that is tiered to meet 3 different levels of students. It also includes a short art project that is also differentiated for students wanting earn certain grades. This activity meets social studies standard SS5H3 and writing standard W.5.10. I've found this to be very engaging for students and it is a wonderful way to introduce our unit Leading American into the 20th Century.