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Witness
![Teaching Tolerance illustration of an adult witness another teacher in act of racism to a student in class](/sites/default/files/styles/article_thumbnail_s_m_l_xl/public/2017-07/Teaching%20Tolerance_TT27_Witness_1800px.jpg?itok=PYpesbF0)
What happens when the role of guest and substitute teachers is complicated through witnessing racism, sexism, prejudice or other mistreatment?