As educational publishers continue to deal with dramatic changes in the college and school markets, two high-placed executives at Houghton Mifflin Harcourt and Cengage are leaving their jobs: Mary Cullinane, executive v-p and chief content officer at HMH, and John Leahy, chief financial officer at Cengage.

In a filing with the Securities & Exchange Commission on Thursday, HMH reported that Cullinane will step down by the end of July.