(MCT) — CHICAGO — First lady Michelle Obama rolled out her latest health and fitness initiative in Chicago on Thursday, just as city heath officials released new data showing one in four of the city’s public school students is obese.

The “Let’s Move! Active Schools” initiative, the second phase of the first lady’s national campaign to fight childhood obesity, will provide grants to 50,000 schools across the country to develop physical education programs over the next five years. The $70 million program, a first of its kind partnership with corporations, will be funded primarily through a $50 million donation from Nike Inc.