 BOSTON, March 22, 2021 PRNewswire -- Learning technology company Houghton Mifflin Harcourt HMH Nasdaq: HMHC today announced that Jean-Claude Brizard, President and CEO of Digital Promise, a global, nonpartisan, nonprofit organization focused on accelerating innovation in education, has been appointed to HMHs board of directors. We are thrilled to welcome Jean-Claude to HMHs board, said Larry Fish, chairman of the board of directors, HMH. 