Cambium Learning Group, Inc. operates as an educational solutions and services company in the United States and internationally. The company operates through three segments: Learning A-Z, Voyager Sopris Learning, and ExploreLearning. The Learning A-Z segment provides preK-6 education technology. It operates subscription-based Websites, such as Reading A-Z, Raz-Kids, Headsprout, Science A-Z, Writing A-Z, Vocabulary A-Z, and ReadyTest A-Z that offers online supplemental books, lessons, assessments, and other instructional resources for individual classrooms, schools, and districts. The Voyager Sopris Learning segment provides technology, materials, and professional development services for educators to ensure students graduate prepared for college, career, and satisfaction in life after K-12. It also offers Kurzweil 3000, a reading, writing, and learning software for addressing language and literacy difficulties; and Kurzweil 1000, a scan and read software that makes printed or electronic text accessible to people who are blind or visually impaired. The ExploreLearning segment develops STEM-based curriculum tools to demonstrate practical applicability of math and science fields. Its products include Gizmos, a library of online simulations of math and science concepts in grades 3-12; and Reflex, an adaptive online solution for math fact fluency development for grades 2-8. The company sells its products to public school districts, private and charter schools, teachers, home school and parent consumers, and other companies through sales force, and e-commerce and Internet. Cambium Learning Group, Inc. was incorporated in 2009 and is based in Dallas, Texas.