What I now know about the fear in not feeling comfortable teaching something is to go toward it rather than move away from it. (edutopia.org)
Further, LED bulbs generate very little heat, so they can't burn staff or children, and they make for a more comfortable teaching environment. (qaeducation.co.uk)
In one case, a science teacher in her second year had been given physical education classes, but wasn't comfortable teaching in an open space. (educationmattersmag.com.au)