monday, 45-year-old michael landsberry, also a math teacher, was shot to death in sparks, nevada. ms. ritzer's final tweet to her friends was about that tragedy. "my thoughts and prayers are with those involved in the nevada middle school shooting. simply devastating." today, her best friend described her as overflowing with life. >> she didn't do crazy things to make her happy. she could find joy in anything. she brought so much joy in my life. >> reporter: on twitter ritzer called herself a "math teacher often too excited about the topics i'm teaching." >> she was born to teach. she always loved working with kids. i think they just gravitated towards her and i think as much as they loved her she loved them 100 times more. >> reporter: chism had recently moved here from tennessee. he was on the soccer team. last night, he missed practice and his teammates went out searching for him. >> what kind of person is he?