David Duane Cooper is a math teacher from North Platte, Lincoln County, Nebraska, United States. Here are 13 more things about him:

1. On May 20, 1993, he graduated from North Platte High School on West 2nd Street in North Platte.
2. On May 30, 1997, he graduated from the University of Nebraska at Kearney in Kearney, Buffalo County, Nebraska with bachelor’s degrees in computer science and speech communication.
3. On September 14, 1998, he suffered a mild stroke. On November 10, 1998, he joined North Platte High School as a volunteer teaching assistant.
4. On December 21, 2004, he graduated from Chadron State College in Chadron, Dawes County, Nebraska with a bachelor’s degree in mathematics.
5. On December 20, 2005, he graduated from Chadron State College with a master’s degree in mathematics.
6. On August 1, 2006, he graduated from Chadron State College with a bachelor’s degree in education and joined North Platte High School as a math teacher. He later served as the high school’s speech coach.
7. On December 19, 2007, he graduated from Chadron State College with a master’s degree in educational technology.
8. On April 12, 2008, he and Emily Cooper got married. In 2013, she gave birth to their daughter.
9. On August 1, 2009, he became the director of mathematics and curriculum at North Platte High School.
10. On March 1, 2012, he graduated from Chadron State College with a master’s degree in administration.
11. In January 2021, he was named the 2021 Central Nebraska Forensic League (CNFL) Coach of the Year. On December 10, 2021, he was dismissed from his speech coaching position at North Platte High School.
12. Between December 2022 and January 2023, he allegedly sexually assaulted a female North Platte High School student, then 17, on three different occasions.
13. He was 46 years old when he was arrested on February 22, 2023. He was charged with sexual abuse by a school employee and booked into the Lincoln County Detention Center in North Platte.