Another useful resource is an initiative led by a group of 12 states working to create comprehensive, high-quality open educational resources (OER) supporting K-12 mathematics and English language arts that are aligned with state learning standards and leverage technology and provide digital content to students. http://k12oercollaborative.org/ They are conducting a webinar on March 11th that is free and explains the project. Information/Registration link is http://www.inacol.org/events/webinars/leadership/