Three eastern Iowa teenagers were killed in two seperate crashes over the weekend.A car and a pickup truck collided head-on in Scott County early Sunday morning, killing 16-year-old Andrew Elverd of Princeton. Elverd was driving the car. The pickup was driven by 50-year-old Rosemary Dickey of Princeton, who is in fair condition. Dickey’s teenage grandson was also injured in the crash but was released from the hospital.The other two deaths in eastern Iowa hit the Lin-Mar Marion school district hard. 17-year-old Kevin Farwell and 16-year-old Megan Knopolus died Saturday when their car crossed the center line and struck and s-u-v near Marion. The driver of the other vehicle, 32-year-old Lisa Ellison and her two children, were pulled from the burning wreck. One child was treated and released, while the Ellison and the other child are in fair condition. Lin-Mar Principal Kevin Van Dyke says it’s an in-service day, but counselors will be on hand at the school today, and throughout the week.Knopolus was a sophomore at Lin-Mar, while Farwell had attended school there before moving to Urbandale this summer.