State school chiefs and governors Core's own website not National Governors Association website http://www.corestandards.org Developed National Governors Association (NGA) not implemented by 43 “states” Common Core State Standards devised by a coalition of individual States National Governors Association National Governors Association (NGA) state-led initiative devised by a coalition of individual States Common Core State Standards Core's own website Core's own website devised The Development Process Core's own website not Source adopted by website state school chiefs hatched the idea Common Core State Standards developed by educational leaders from 48 of the 50 states mantra across the country Common Core State Standards were introduced According to its short and hectic record According to its short and hectic record not arguments lengthy standards development process Common Core State Standards Core's own website website arguments Common Core State Standards claims State school chiefs and governors Core's own website Common Core of State Standards (CCSS) written by experts across the country National Governors Association devised by a coalition of individual States corestandards.org Common Core State Standards was driven arguments Race to the Top Common Core of State Standards (CCSS) arguments Common Core teaching standards NGA Common Core Common Core of State Standards (CCSS) developed in 2009 NGA Core's own website From Crawling to Walking