Kathy A. Hertzog was a student at the former Lausch Elementary School in the Exeter School District when her teacher gave her a lower grade on her math notebook than her classmates.   She let her teacher know how unfair she thought that was because she knew she had done just as much work as the others, but in a different way.  And so began her career as an activist for people with disabilities. Her disabilities have been diagnosed as cerebral palsy or a spinal cord injury at birth or possibly both.  That didn't matter to her. What did matter was living independently and making sure that other people with disabilities could do the same.