dr. covington? this? >> well, with regard to seat time in kansas city, there is a law in missouri that also requires seat time, but that's more closely monitored at the -- i'm sorry, more closely monitored at the secondary level, grades 9-12, when children began to earn a carnegie unit which is actually based on time to determine whether or not they've earned enough credits to be eligible for graduation. elementary schools, while there's still seat time, the students are placed in a learning environment where we say if you can master this body of knowledge within seven months opposed to the nine, that's fine. you move to the next level. or if it takes you ten months or 11 months to get it, that's also fine. you progress through levels and not grades based on whether or not you've mastered specific identified learning targets, and then we have an individualized education plan for each and every child that's based on the deficiencies that they have based on assessment outcomes. and we give, now, children wh