WASHINGTON — The administration is adding some teeth to First Lady Michelle Obama’s “Lets Move” campaign with new rules that ban sugary soft-drink ads from school property, including scoreboards.

Student discount coupons for junk food would also get yanked under the new guidelines announced by the first lady on Tuesday.

“The idea here is simple: Our classrooms should be healthy places where kids aren’t bombarded with ads for junk food,” she said.

The rules also would expand access to free school lunches.