Supervision ratios and planning

How many adults are enough? It is one of the first questions staff ask when planning recess duty, a gym class, a museum trip or a canoe expedition, and one of the most common questions in an injury review. There is no single number that works everywhere. The right ratio depends on the students, the activity, the site and the skills of the adults. This lesson explains how the district sets ratios, how schools plan duty schedules and trip staffing around them, how volunteers fit in, and what happens when an adult is missing on the day.

Why there is no single legal ratio

Minnesota law does not set a general student-to-adult ratio for supervision in schools, apart from specific programs such as some special education settings. Instead, the duty to supervise is met through district policies and recognized guidelines, which set out supervision levels and, for higher-risk activities such as swimming, skating and canoeing, specific ratios and qualifications. Where an activity has a ratio in those guidelines, the district treats it as the minimum.

The district's ratios are minimums, not targets. A plan can always add adults, and it should when the factors from lesson 1 point that way: younger students, a riskier activity, an unfamiliar site, students with known needs, or adults who are new to the activity.

The district's ratio table

The table below shows the district's minimum ratios for common situations. The numbers are the district's own; other boards and districts use similar, but not identical, figures. 'Adult' means a staff member or an approved volunteer, and every outing must include at least one staff member who is in charge.

Two rules in the table deserve special attention. First, there must always be at least two adults on any outing, so that one can deal with an emergency while the other stays with the group. A single teacher with a class on a trip has nobody to send for help and nobody to watch the others while they care for an injured student. Second, for overnight trips, the adult team must be able to supervise sleeping areas appropriately, which usually means adults of more than one gender when the group includes students of more than one gender.

Students who need more support

Ratios assume a typical group. When a class includes students who need more support, the planning has to account for them separately. A student with a one-to-one support plan, a student with a history of running away, or a student with a medical condition who needs an adult close by is not part of the general ratio. Willow Park plans these students first and then calculates the general ratio for the rest of the class.

This is not optional. Section 504, the ADA and IDEA require districts to include students with disabilities in trips and activities with appropriate accommodation, and a student's Individualized Education Program (IEP) or 504 plan may already describe the support they need. Leaving a student behind because there is no extra adult is a last resort and must be discussed with the family and the principal well in advance.

Planning staff numbers for a trip

Aaron Fisk is planning a day trip to a conservation area for his sixth-grade class of 27. The program below calculates the adults he needs, starting with students who need their own adult and then applying the district's ratio for a moderate-risk trip to the rest, and making sure the minimum of two adults and at least one staff member is met.

import math
# Adults needed for a trip: individual supports first, then the general ratio.
def adults_needed(students, one_to_one, ratio, min_adults=2):
    general = students - one_to_one
    for_general = math.ceil(general / ratio)
    total = max(one_to_one + for_general, min_adults)
    return one_to_one, for_general, total

trips = [
    ("Grade 6 conservation area (moderate)", 27, 1, 8),
    ("Grade 2 museum visit (low risk)",      22, 2, 6),
    ("Grade 11 canoe trip (wilderness)",      16, 0, 6),
]
for name, n, ones, ratio in trips:
    a, b, t = adults_needed(n, ones, ratio)
    print(f"{name:38} {n} students: {a} individual + {b} general = {t} adults")

Grade 6 conservation area (moderate)   27 students: 1 individual + 4 general = 5 adults
Grade 2 museum visit (low risk)        22 students: 2 individual + 4 general = 6 adults
Grade 11 canoe trip (wilderness)       16 students: 0 individual + 3 general = 3 adults

Aaron needs five adults: one assigned to a student in his class with a one-to-one plan, and four for the other 26 students at one adult for every eight. The second-grade museum visit needs six, and the canoe trip needs three, though the district's canoe rules add other requirements covered in lesson 7, such as certified leaders. The calculation is the starting point; the trip plan then assigns each adult a named group of students and a role.

Volunteers

Parents and community volunteers make many trips and events possible, but they are not staff, and the district treats them differently in several ways:

• Every volunteer who works directly with students must pass the district's background check before their first activity, and repeat it on the district's schedule.
• Volunteers receive a short briefing before each trip: the schedule, their group, the rules, the meeting points, what to do if a student is missing or hurt, and how to reach the teacher in charge.
• Volunteers are not left alone with a single student out of sight of others, do not give medication except an epinephrine auto-injector in an emergency if trained, and do not discipline students beyond redirecting them. They report problems to the teacher.
• Volunteers do not drive students in their own vehicles unless the district's driver requirements are met, which are covered in lesson 5.

A volunteer's own child in the group is a common complication. Parents naturally focus on their own child. Willow Park assigns parent volunteers to a group that does not include their child whenever possible, and makes sure every volunteer understands that they are responsible for the whole group assigned to them.

Duty schedules

Inside the school, supervision is organized through duty schedules for the yard, hallways, lunchroom, bus loop and before and after school. A good schedule does four things: it covers every place and time where students are present; it puts more adults where and when the risk is higher; it is posted where everyone can see it; and it names who covers when someone is absent.

Duty schedules also have to respect collective bargaining agreements, which often set limits on supervision duties for teachers. Principals balance these limits by using paraprofessionals, lunchroom supervisors and administrators, and by adjusting bell times. The supervision still has to happen; the agreements affect who does it.

Absences are where schedules most often fail. A substitute teacher who does not know about yard duty leaves a zone empty. Willow Park's daily absence sheet lists each absent staff member's duties alongside their classes, the office assigns cover before the first bell, and every substitute teacher folder includes the duty schedule, the yard map and the medical alert card.

When an adult is missing on the day

Even with careful planning, a volunteer cancels the night before a trip or a staff member calls in sick. The district's rule is that the ratio is met on the day or the plan changes. The options, in order, are to find a replacement adult, to reduce the riskier parts of the trip, to split the group so part stays at school with another teacher, or to postpone. Going ahead with fewer adults than the minimum is not one of the options.

Events outside the school day

Dances, concerts, games, open houses and graduation events bring large crowds, families, younger siblings and visitors into the school, often in the evening. They need their own supervision plan, because the usual duty schedule does not apply. Marion Clarke's checklist for evening events at Pinecrest High School covers:

• Staff numbers based on expected attendance, with a staff member in charge and a second administrator or senior staff member as backup.
• Assigned posts: entrances, restrooms, the gym floor, the parking lot at the end, and a roaming pair.
• Clear rules on who may attend, such as students of the school and signed-in guests for dances, and on re-entry once someone leaves.
• A plan for students who arrive or appear impaired, including calling the family and, where there is a medical concern, calling 911.
• First aid supplies, an AED within reach and a list of students with medical plans who are likely to attend.
• A plan for the end of the event: lights on, supervised exits, staff staying until the last student has been picked up or has left as permitted by the family.

The two-adult principle and professional boundaries

Good supervision also protects students from harm by adults. Most staff and volunteers are trustworthy, but abuse in schools and youth programs has repeatedly happened where one adult could be alone with a child for long periods, out of sight of others. The district follows a two-adult principle wherever practical: interactions with individual students happen where other people can see or hear, with the door open or a window in the door, and private conversations take place in visible spaces such as a corner of the library or an office with a glass panel.

When a one-to-one situation cannot be avoided, such as a student who needs help in the restroom or a counseling conversation, the staff member follows the student's plan, tells another adult where they are, and keeps records where required. Staff do not drive individual students home, communicate with students through personal social media or private messaging, or give students personal gifts, except as the district's policy allows. These rules protect students and they also protect staff from false allegations.

If a staff member sees another adult breaking these boundaries, or has reason to suspect a student is being harmed by anyone, they report it. Under Minnesota's mandated reporter law, school staff must report suspected maltreatment to the local welfare agency or police themselves, promptly; telling the principal does not replace that report. The district also expects staff to tell the principal.