    Senténce'l: What cin’ hut a téacker's mental and physical  ealth?, :  Sentence 2 Siress canbe caused: by orbarizational change;  ‘relationships.’ .with Students, fellow ~ teachers, .: aid,  ‘administrative’ personnel, working environment, expectations  to subsittute, .ling hours’ with: @” heavy’: worklbad, “and  inispections.    