It's interesting to note that the NY Daily News did note that the ACS has warned of this work in "Chemical Safety for Teachers and Their Supervisors." in this article:
http://www.nydailynews.com/new-york/beacon-teacher-faulted-experiment-leaves-students-badly-burned-article-1.1565533
The NY Times article on the event, which focuses on the CSB warning, can be found at
http://www.nytimes.com/2014/01/04/nyregion/school-experiment-that-burned-boy-was-focus-of-federal-warning.html?ref=todayspaper&_r=0#h[]
- Ralph
Ralph Stuart CIH
Chemical Hygiene Officer
Department of Environmental Health and Safety
Cornell University
rstuart**At_Symbol_Here**cornell.edu