First Lady Michelle Obama will be joined by thousands of Chicago’s teachers and students at McCormick Place today for the newest part of her “Let’s Move” campaign to fight childhood obesity.

Obama is encouraging school administrations to use creative ways to help students get the recommended hour of daily exercise. Today, Obama will be joined by Olympic gymnast Gabby Douglas, tennis star Serena Williams, U.S. Education Secretary Arne Duncan, Chicago Mayor Rahm Emanuel and NIKE Inc. President & CEO Mark Parker.

School officials can sign up for Obama's Let's Move initiative at its new website.

One in four children enrolled in Chicago Public Schools (CPS) are obese, according to a report by the Chicago Department of Public Health. The report revealed that the highest instances of obesity for CPS students is in sixth grade, at 29 percent, and the lowest was among kindergartners at 20 percent. About 25 percent of ninth graders are obese, the report found.

“The numbers that we’re seeing in kindergarten are really promising and they’re giving us hope that we’re really moving in the right direction,” Chicago Department of Public Health Commissioner Dr. Bechara Choucair told the Chicago Sun-Times. “But they’re still not where we’d like them to be and that’s why we’ve introduced Healthy CPS.”

The district announced the launch of  the Healthy CPS Action plan today, which "contains 60 detailed, district-wide and concrete strategies to improve the health and wellness of Chicago’s students. This plan builds on the school district’s existing Healthy CPS agenda, which outlines specific goals for student health and brings CPS in line with Mayor Emanuel’s city-wide agenda to help all Chicagoans get and stay healthy," according to a press release from the Mayor's office.