This Friday, Sept. 19, 2014 photo shows the exterior of the Lalo Delgado school campus in Denver. Four students were injured, one seriously, when a teacher was pouring methanol onto a table top and igniting it during a chemistry class demonstration last Monday. Educators and investigators say some teachers lack the training required by law and don't know about standard safety measures that can dramatically lower the inherent dangers of hands-on experiments they say are vital to science education. (AP Photo/Brennan Linsley)

Stories this photo appears in:

Experts: Science class can dazzle with less danger

• By ncs-import
• September 21, 2014