These two video assessments will give you a good assessment tool as your students watch the documentary "America Before Columbus" by National Geographic © 2010. This film does a wonderful job of exhibiting the effects, on both sides, of the Columbian Exchange between the Old and New Worlds. These sheets work well as a guided note for viewing the film as well. The answer keys are included in this product.
The questions are in chronological order with the film.The entire video is approximately 90 minutes, so the sheets have been split into Part 1 and Part 2.