What is the greatest challenge to maintaining successful after-school programs?

"A New Day for Learning," a report published by the Time, Learning, and Afterschool Task Force and funded by the Charles Stewart Mott Foundation, will be released January 17. The report, which you can download at Edutopia.org and is highlighted in an upcoming Edutopia issue, calls for a dramatic shift in the way we view the structure of the school day. It argues that after-school enrichment programs, including both academic and recreational components, are crucial to student success and achievement. Effective after-school programs, however, are not easy to implement -- or to maintain. What do you see as their greatest obstacle?