In building projects or renovations, architects and administrators tend to label the science instructional space as a "science classroom," as opposed to a "science laboratory." What exactly is a science classroom, and what is a science laboratory? According to OSHA's Laboratory Standard (OSHA #29 CFR part 1910.1450), "laboratory" means a facility where the laboratory use of hazardous chemicals occurs. It is a workplace where relatively small quantities of hazardous chemicals are used on a non-production basis." The middle school science teacher should care because "laboratory" designation compared to "classroom" designation carries a much higher level of legal protection when it comes to safety. (Contains 2 online resources.)