Final answer:
The history teacher referenced is Anne Mansfield Sullivan, known for her role as Helen Keller's instructor.
Step-by-step explanation:
It appears there is a mix-up in the question. The first paragraph refers to a teacher named Anne who has been a social studies teacher at Cadillac High School since 2005, which could indicate that Anne may have been a history teacher in Kansas. However, the second paragraph refers to Anne Mansfield Sullivan, who is famously known as Helen Keller's instructor and companion. Anne Mansfield Sullivan began teaching Keller on March 3, 1887, when Keller was about to turn seven years old. Since the historical context clearly refers to Sullivan and not the modern-day social studies teacher, it is Sullivan who is the history teacher being referred to in your question.