How do I get my students to wear safety eyewear?
First of all, adopt a firm goggle policy. Any time chemicals, glassware or heat are used, students must wear their goggles.
Purchase goggles that fit and are comfortable to wear. How can you expect students to wear goggles if they really do hurt their face?
Students who forget to wear goggles should be warned and/or penalized. A really good penalty is to tell each lab team that if one of them is caught not wearing his goggles, they will all have to wear their goggles during the next non-lab period. (This usually gets their attention.)
For students who simply refuse to wear their goggles, excuse them from the lab and give them a zero.