The rumor has spread nationwide among parents and day-care providers.
They have also spread into streams and rivers nationwide.
A similar backlash against testing excess is spreading nationwide, with protests by parents, school officials and students.
This was reported in the press and rapidly spread nationwide.
Those experiments have since spread nationwide, though it is too early to gauge their effectiveness.
Metal detectors have spread nationwide, including to schoolhouses in some cities.
In 1877 a railroad workers strike began that was to spread nationwide.
But some analysts say that may not be enough to halt violence that has spread nationwide.
The disruption in New York also did not seem to spread nationwide, although it slowed activity.
Inroads was founded 23 years ago in Chicago and has spread nationwide since then.