Junior George Sekalias helps younger players with their marching band stance during Band Day at Glenbrook South High School on Sept. 12, 2012. | Joe Cyganowski~For Sun-Times Media

Senior Aaron Gamalinda helps band members form a proper line during Band Day at Glenbrook South High School on Sept. 12, 2012. High-schoolers and junior high students performed together. | Joe Cyganowski~For Sun-Times Media

Attea School band members wait for the start of Band Day at Glenbrook South High School. | Joe Cyganowski~For Sun-Times Media

Members of the Glenbrook South marching band worked with junior high school musicians during Band Day at the high school Sept. 12, 2012. The main event was a huge combined performance. | Joe Cyganowski~For Sun-Times Media

Members of the color guard were also part of Band Day at Glenbrook South High School on Sept. 12, 2012. | Joe Cyganowski~For Sun-Times Media

Greg Wojcik gets a bird's-eye view of the stadium during Band Day at Glenbrook South High School on Sept. 12, 2012. | Joe Cyganowski~For Sun-Times Media

Members of the Glenbrook South marching band worked with junior high school musicians during Band Day at the high school Sept. 12, 2012. The main event was a huge combined performance. | Joe Cyganowski~For Sun-Times Media

Attea student Dylan Icard and Springman student Walter Meyer pace off steps while learning a marching program during Band Day at Glenbrook High School on Sept. 12, 2012. | Joe Cyganowski~For Sun-Times Media

A reflection of Greg Wojcik as he watched and guided Band Day activities at Glenbrook South High School on Sept. 12, 2012. | Joe Cyganowski~For Sun-Times Media

Springman student Garrett Moran grabs some water during a break in the action at Band Day at Glenbrook South High School on Sept. 12, 2012. | Joe Cyganowski~For Sun-Times Media

Glenview - Band Day at Glenbrook South H.S. The event is on the turf football field. GBS students and Jr. High students, from Maple, Springman and Attea schools participate to create a huge combined performance. | Joe Cyganowski~For Sun-Times Media

Tuba players Matthew Landover (from left), Eli Mitchell and Delaney Ehrhardt form up during Band Day at Glenbrook South High School on Sept. 12, 2012. | Joe Cyganowski~For Sun-Times Media

Junior high school musicians file off buses and into the football stadium at Glenbrook South High School for Band Day on Sept. 12, 2012. | Joe Cyganowski~For Sun-Times Media