Veritas Capital-backed Houghton Mifflin Harcourt, a learning technology company, completed the acquisition of NWEA, a not-for-profit, research and educational services organization serving K-12 students. Financial terms were not disclosed. "We are thrilled to welcome NWEA's talented and innovative team to the HMH community. Together, we are deeply focused on the transformative power of education. We look forward to diving into our collective work in support of students and teachers," Jack Lynch, HMH CEO.