Published: Nov 22, 2010 6:45 PM EST
Updated: Nov 22, 2010 3:46 PM EST

Michelle Obama is in Miami at Little Havana Elementary School to promote her "Let's Move" campaign.

Local chiefs will be joining her in showing how to make an salad bar.

The campaign is also trying to gain support from from the major school suppliers to lower the sugar, salt and fat in the meals they serve the students.

The First Lady wants to double the number of schools in the Healthier U.S. Schools Challenge.