i would like to turn it over to ken coates, who will lead this brief presentation on our data. hi, director camps directorkim. -- director kim. >> i would like to introduce you to my director who will give you an overview of the youth risk behavior survey, also known as ybs. while we're getting our slide show cued up, and do want to a balanced team members who helped with this work. ken levine, who is our wire coordinator, donna, rows of -- rosa. and market. -- mark. i wanted to thank them for being here this evening. >> got it. >> we're going to present very briefly two surveillance systems that we use to get a shot of health and wellness of our elementary students. we sometimes refer these two checks from 2011 which has as it waited sample of over 60% across the board. the unit's survey we do across grades 6, 7, and eight, as well as ninth, 10th, 11th, and 12. we also have a representative sample of 74%. this is probably the most critical element of data to give our students a picture of health and wellness and data certainly i think the alliance with district goals if we wan