Learner Express Learner Express is a gallery of short video modules distilled from over 350 hours in the Annenberg Learner Collection. The science topics are useful in a STEM-based curriculum, while the math topics align with the Common Core Standards. You can quickly locate 1-5 minute videos to enhance classroom or professional learning. Indexed, annotated, and linked to related resources, Learner Express embodies the best of just-in-time learning.
Which Famous Cathedral Collapsed?
Four of the grandest medieval cathedrals are shown -
one of which was not structurally sound and collapsed.
After looking at the photos try to select which cathedral
fell and see if you can determine, from the picture, why
it might have happened.