In the case below would mediation be the correct choice for alternative dispute resolution?

Andrew Brown, a first grader at Bayfield Elementary School in London, Ontario was excused from class to use the restroom. While using the urinal, his pants came in contact with an undiluted general-purpose disinfectant solution that had puddled onto the floor. After returning to class, the student began complaining of burning and stinging near his left hip area. The student was sent to the school nurse and was provided with an ice pack and returned to class. The teacher became concerned as the student's condition worsened and he was carried to the nurse's office for further examination. It was then discovered the student had a five inch by four-inch wound on his left hip area. Andrew was taken to the hospital where doctors later determined the student had suffered a third-degree chemical burn. Andrew had to undergo several surgeries and major skin grafting while spending a month in the burn unit. His mother filed a lawsuit alleging the London District School Board was negligent in ensuring her son's safety at school.

What are the grounds for the law suit? Who would be named as defendant(s) and why?