Cambium Learning Group, Inc. is the providers of intervention curricula, educational technologies, professional services and other research-based education solutions for students in the pre-kindergarten (Pre-K) through 12th grade education market in the United States. The Company operates in three business segments: Voyager, an intervention business; Sopris Learning, a supplemental solutions education business, and Cambium Learning Technologies (CLT), a technology-based education business. The intervention market, where the Company focuses, provides supplemental education solutions to students. The Company offers an intervention solution, which includes textbooks, education games, data management, teacher training and student centric e-learning solutions. In October 2011, it completed the acquisition of Class.com.