BOSTON--(BUSINESS WIRE)--Global learning company Houghton Mifflin Harcourt (HMH) (NASDAQ: HMHC) and Trunity Holdings, Inc. (OTCQB:TNTY) today announced the addition of new HMH digital curricula to the Trunity eLearning Platform, enabling on- and offline access to HMH programs for K-12 educators and students around the world. “Access to strong educational content is one of the most powerful tools we have for overcoming economic and social challenges,” said Tim Cannon, Executive Vice President, I