As a preschool teacher - unfortunately I'd say a large portion of your job is hampered by your inability to speak. Reasonable accommodation would be letting you have a longer break because of fatigue etc... But spitting into something in the classroom, isn't - from a health standpoint - safe - for the children, (you know what little ones are like they get into everything, and the parents would have grounds to complain - I work for the school board so I've heard all manner of complaints) and not being able to speak is huge. I would wait to heal a little more. Probably not the answer you want to hear... Not a fan of the union perse but this is one benefit of being unionized. Rest up...