http://www.cgcs.org/Domain/36
https://www.teachingchannel.org/blog/2013/09/13/talking-to-parents-about-the-ccss/?utm_source=Teaching+Channel+Newsletter&utm_campaign=446a6853cc-Newsletter_September_14_2013&utm_medium=email&utm_term=0_23c3feb22a-446a6853cc-291559013