Athletics From 1971 until 2013, Southeast was nominated for twenty All Sport Championships. From its beginning in 1955, Southeast has won 114 state championships for team sports in various athletic fields.
Non-athletic programs Southeast offers many other non-athletic programs, such as drama, speech, and debate. Southeast's dance team, the Shirettes, have won national competitions since their inception in the 1980s, including in 2015. Southeast's cheerleading competition team won the state title in 2010 and 2016.
Music Southeast also has a music program that includes three symphonic bands, marching band, three jazz bands and eight choirs that compete in numerous state festivals. The Nebraska Cornhusker Marching Band was unable to attend the
Holiday Bowl, and the Lincoln Southeast Marching Knights were asked to fill in at the bowl game. They played for the
Nebraska Cornhuskers football team as they took the field on December 30, 2009 and performed during the game. The Lincoln Southeast Marching Knights will be performing at the halftime show of the 2019 Valero Alamo Bowl in a mass band. ==Notable alumni==