NCLB is no longer in effect as of 7 months ago. How were your students affected by NCLB?
If you have a summer reading program then isn't that exactly what you were wishing for when it came to at risk kids - aside from the already in place, nationally mandated ESY program? I am not sure what more you are looking for as it seems that all the bases are covered. You cannot force parents to make their children attend some programs either, especially when transportation is not provided like for a summer reading program. When parents work trying to drive a kid back and forth to a reading program is typically not something they can figure out, especially if the kids are younger and they're already paying for camp or day care.