Negligence in schools: what the cases teach

Most school injuries never reach a lawyer. A scraped knee is cleaned, a parent is called, and the day goes on. But some injuries are serious enough that families look for compensation, and when they do, the question becomes whether the school was negligent. Staff do not need to become lawyers, but knowing how negligence works, and what courts have said in school cases, makes it much easier to understand why policies ask for what they do. This lesson walks through the elements of negligence, the defences, who actually pays, and the cases that shaped supervision practice.

The four elements

To succeed in a negligence claim, the injured person has to prove four things:

• Duty: the defendant owed them a duty of care. In schools, this is rarely in dispute, because the relationship between staff and students creates the duty.
• Breach: the defendant failed to meet the standard of care, meaning they did not act as a careful parent or reasonable adult in the same role would have acted.
• Causation: the breach actually caused the harm. If the injury would have happened anyway, even with perfect supervision, the claim fails on causation.
• Damage: the person suffered real harm, such as an injury, financial loss or a recognized psychological injury.

Almost every school case turns on breach and causation. Was the supervision reasonable for those students and that activity? And if it was not, would better supervision have prevented the injury? A supervisor who was chatting at the far end of a yard when a fall happened may have breached the standard, but if the child slipped on a dry, level surface while walking, a court may conclude that no reasonable supervision would have stopped it.

Defences and shared fault

Several defences can reduce or defeat a claim. The most common in school cases is contributory negligence: the student's own carelessness contributed to the injury. Under Ontario's the Negligence Act, a court can divide responsibility between the parties and reduce the damages by the student's share. Courts are careful with children, though. A child is judged against what a child of similar age, intelligence and experience would have done, and very young children are rarely found at fault at all. Voluntary assumption of risk, the idea that the student knowingly accepted the danger, almost never succeeds against a school, because students are expected to be taught and protected, not to bargain away their safety. Ontario's Limitations Act generally gives two years to start a claim, but the clock does not run while the injured person is a minor, so a claim for a childhood injury can arrive years later.

The long time limits are one reason the board insists that incident reports be written promptly and kept. A report written the same day, describing where the supervisor was standing, what instructions had been given and what the student did, is far more useful years later than anyone's memory.

Who pays

When a staff member is negligent while doing their job, the board is normally responsible as their employer. This is called vicarious liability, and it means the claim is usually brought against the board, which is insured. Ontario boards are insured through reciprocal insurance arrangements among school boards. Individual staff are rarely asked to pay damages personally, but they can be named in a claim, may have to give evidence, and can face discipline or professional consequences if they ignored policies. The point of good supervision is not to protect the board's insurance; it is to prevent the injury in the first place.

What the cases teach

School negligence cases are useful because they show, in concrete detail, where courts drew the line. The facts below are summarized, and the lessons are the ones courts and safety organizations have drawn from them.

Gymnastics and specialized activities

In Thornton v. Board of School Trustees of School District No. 57 (Prince George), decided by the Supreme Court of Canada in 1978, a high school student was left paralyzed after landing badly from a springboard somersault onto a foam mat, in a gym class where the teacher was nearby but working on something else. The court found the teacher had allowed a dangerous exercise without proper progression, equipment or attention. In Myers v. Peel County Board of Education (1981), a fifteen-year-old was badly hurt dismounting from the rings in a small room off the main gym, without a spotter, while the teacher supervised other groups. The court found the board liable because the supervision and matting were not adequate for that activity, but also found the student partly at fault for attempting a move he had been told not to try without a spotter. Together these cases established that the careful parent standard applies in light of the activity, and that dangerous activities need progression, proper equipment and close, competent supervision.

Unstructured time

Many claims come from recess, lunch and class changes rather than lessons. Canadian courts have generally held that schools do not have to watch every child every second in a playground, but they must have a reasonable number of supervisors, placed and moving where trouble is likely, with rules that are enforced. Courts have found schools liable where supervisors were missing from an assigned area, where a known dangerous game was allowed to continue, or where a hazard, such as an icy slope or broken equipment, was left in use. They have found schools not liable where reasonable supervision was in place and an injury happened suddenly in ordinary play.

Trips and outdoor programs

In Bain v. Calgary Board of Education (1993), a student on an outdoor education trip was seriously hurt while climbing on a mountain slope with friends during unsupervised time. The court found the board liable for allowing an unsupervised outing in risky terrain without clear limits or a proper plan, and found the student partly at fault. The case is often used in training to show that 'free time' on a trip is still supervised time, that boundaries must be set and checked, and that older students still need structure in an unfamiliar, hazardous place.

Known individual needs

Claims also arise when staff knew about a particular student's needs and did not plan for them: a student with a known severe allergy who was given food at a class party without checking, a student with a history of running away who was not assigned an adult on a trip, a student with epilepsy allowed to swim without one-to-one supervision. These are among the hardest claims to defend, because the risk was not just foreseeable in general; it was written in the student's file.

Putting numbers on shared fault

When a court finds both the school and the student at fault, it divides the damages. The program below shows how the division works with a few made-up examples. The fault shares are decided by the court based on the evidence; the arithmetic is then simple.

# How shared fault reduces damages (invented examples).
cases = [
    ("Grade 10 rings dismount, no spotter", 400_000, 0.20),
    ("Grade 12 off-trail scramble on a trip", 250_000, 0.35),
    ("Grade 3 trip on broken playground step", 18_000, 0.00),
]
for name, damages, student_share in cases:
    paid = damages * (1 - student_share)
    print(f"{name:40} assessed {damages:>9,}  student share {student_share:4.0%}  school pays {paid:>9,.0f}")

Grade 10 rings dismount, no spotter      assessed   400,000  student share  20%  school pays   320,000
Grade 12 off-trail scramble on a trip    assessed   250,000  student share  35%  school pays   162,500
Grade 3 trip on broken playground step   assessed    18,000  student share   0%  school pays    18,000

In the first two examples, the older students' own decisions reduce what the school pays but do not eliminate the school's responsibility, because the supervision and planning fell short. In the third, a young child is not expected to watch for a broken step, so the school carries the full share. The examples show why staff should never rely on students, especially younger ones, to protect themselves.

What reasonable supervision looks like to a court

Across all these cases, courts look for the same practical evidence. When the board reviews an incident, it asks these questions, because they are the ones a court would ask:

• Was there a plan for this activity or this period, and did it match the students and the risk?
• Were enough adults present, and were they where they were supposed to be?
• Had students been taught the rules and the skills, and were the rules enforced?
• Were equipment and the site checked and suitable?
• Did staff know about individual students' needs and plan for them?
• Did staff respond promptly and properly when the injury happened?
• Was everything written down at the time?

Other kinds of claims

Negligence is the most common claim after an injury, but it is not the only way a school's care of students is tested. Staff should know about a few others, because the same good practice protects against all of them.

• Human rights complaints can follow when a student with a disability is excluded from a trip or activity, or included without the accommodation they need. The Ontario Human Rights Code requires boards to accommodate students with disabilities to the point of undue hardship.
• Bullying and harassment that staff knew about and did not address can lead to claims and to complaints under the Education Act and board policy, which require principals to investigate and respond.
• Failing to report suspected abuse or neglect breaks the Child, Youth and Family Services Act, which requires anyone who works with children to report directly to a children's aid society.
• Privacy complaints can arise when medical information is shared more widely than needed, or not shared with the people who need it to keep a student safe.

After an injury: talking with families

The way a school communicates after an injury affects both the family's trust and, sometimes, whether a claim is made at all. Families who feel informed and respected are far less likely to assume the worst. The board's guidance for staff is practical:

• Call the family promptly, before the student gets home or posts about it, and describe what happened factually: where, when, what the injury appears to be and what first aid was given.
• Express care and concern. Saying 'I'm sorry this happened to Maya' is a normal human response and is encouraged.
• Do not guess about causes or fault, and do not promise outcomes. Say that the school will look into what happened and follow up.
• Tell the family what the school is doing next: an incident report, a review, any change to the activity.
• Pass any questions about compensation or insurance to the principal, who will involve the board.

Staff sometimes worry that any expression of sympathy will be treated as an admission of fault. Ontario's Apology Act, 2009 says that an apology does not amount to an admission of liability and cannot be used as evidence of fault in a civil case. Families notice when staff are cold or evasive, and courts look at the facts of the supervision, not at whether a teacher said they were sorry.