Houghton Mifflin Harcourt is an adaptive learning company that specializes in K-12 education. The company offers a suite of integrated curriculum, assessment, and professional learning solutions intended to support student and teacher development. Houghton Mifflin Harcourt's products are used by various educational institutions, providing core, supplemental, and intervention materials across different subjects. Houghton Mifflin Harcourt was formerly known as Houghton Mifflin Company. It was founded in 2002 and is based in Boston, Massachusetts.

McMillan Education provides educational consulting, with guidance across various educational levels including K-12, college, and graduate programs. The company includes services such as school placement, college admissions consulting, and support for students with unique educational needs. McMillan Education includes services for athletic recruiting, performing arts education, and international student admissions. It is based in Boston, Massachusetts.

Cengage Group offers educational content and technology solutions designed to help students acquire the skills and competencies necessary to be job-ready. It primarily serves the education sector, providing resources for reskilling, upskilling, degree and certificate programs, language learning, and more. It was formerly known as Thomson Learning. It was founded in 1903 and is based in Independence, Kentucky.

TextbookRush is a company specializing in the sale and rental of college textbooks across various subjects. They offer a platform for buying new and used textbooks, renting textbooks and eBooks, and a buyback service to sell textbooks. TextbookRush caters primarily to the educational sector, providing affordable academic materials to students. It was founded in 2002 and is based in Grandview Heights, Ohio.

Mentimeter develops an audience engagement platform in the presentation software industry. The company offers tools for real-time input gathering and visualizing data during meetings, conferences, and training sessions. It primarily serves the business sector. The company was founded in 2012 and is based in Stockholm, Sweden.

Learndirect is an online learning provider that delivers educational courses and qualifications in sectors such as healthcare, business, IT, creative arts, and functional skills. The company offers flexible online courses aimed at individuals seeking to improve their skills and qualifications, as well as businesses looking to train their employees. It is based in Bournemouth, England.