our chief education correspondent rahema ellis, ladies and gentlemen. [ applause ] and to help us startff the conversation, we have two friends with us here on stage. vico lucas, science teacher in the jefferson county schools in louisville, kentucky. and joanna, a biology teacher at the david w. butler high school in charlotte, north carolina. and we're going to start this off by talking about the changes that are going on for teachers and whether or not you all have the tools. we are speaking of course about the train that is rolling down the tracks in 45 out of 50 states, and that's common core. while this is a gathering of teachers and while mostly on the air we assume we are being watched by teachers, rahema, for the lay folks, for the parents joining us, give us your best definition of common core. >> common core is economic development. that's what i'm hearing common core is. if you want to make certain america is prepared for the future, you have 50 million potential workers who are now in the public schools in this country. the people who adopted common core, the 45 states, sai