Hi Marvin and list,
This is just a cautionary note to the suggestion for using strobe lights
to get attention from the class....these lights can induce seizures and
disturb vision for some children and adults.
Ann-on-y-mouse in Columbus
Art teacher, K-5, retired, with nystagmus-
an involuntary eye movement disorder
I know one art teacher that uses as red flashing strobe to alert the class
that he needs them quiet.