High-Quality textbooks and curriculum materials continue to be a problem for school districts across the state five years after California adopted the Common Core  Standards.    In the article "Curriculum Materials a Sticking Point in Common Core Implementation." EdSource. Louis Freeberg and Teresa Harrington, 18 Nov. 2015,  several School District Administrators share the struggles they and many districts are faced with while striving to provide textbooks and curriculum material in alignment with Common Core.