A Junior Fellow at the Library of Congress named Tanya M. Ríos Marrero created this excellent StoryMap that covers the history of the sugar mono-crop economy in Puerto Rico, U.S. involvement after 1898, and legacies of resistance - all leading up to the sugar strike of 1942. It's filled with primary sources that were new to me, and I'm sure they'll be new to many in the TPS Teachers Network. Don't miss the links at the end to still more ideas for exploring Puerto Rico through the Library's digital collections.
https://www.loc.gov/item/2017752070/
3 - 5 6 - 8 9 - 12 Social Studies/History Vocational/Technical Training Puerto Rico labor sugar