How to Find Supply Teachers for Your School: A Practical Guide

Teacher absence is one of the most operationally disruptive challenges a school faces. A call at 6:30am, a class without a teacher, and thirty minutes to sort it before the school day begins — it's a scenario every headteacher, deputy, and school business manager knows too well.

Finding supply teachers quickly, reliably, and without paying over the odds is a genuine operational challenge. The landscape has changed significantly in recent years, and schools that are still relying on a single traditional partner — or worse, scrambling through a list of personal contacts — are often paying more and getting less than they need to.

This guide covers every route available to schools in 2026, what to look for in a supply provider, and how to build a system that means you're never caught short.

Understanding your school's supply needs

Before evaluating providers, it's worth taking a clear-eyed look at your school's actual absence patterns. Schools that don't track this properly often end up overpaying for cover or using the wrong model for their needs.

What type of cover do you need most?

Day-to-day emergency cover — a teacher calls in sick at 6am — requires a provider with a large, immediately available pool of local educators. Speed of response is the priority.

Short-term planned cover — a teacher has a known absence for a week or two — gives you more lead time and the ability to request a specific educator or find someone with subject or phase specialism.

Long-term cover — a term-long maternity cover, a planned secondment, or a vacancy you haven't yet filled — is closer to a temporary recruitment exercise. The right provider for this is one that can match you to someone you'd be happy to have in your school for months, not just days.

Most schools need all three at different times. Understanding which you need most frequently shapes which provider arrangement makes most sense.

What roles do you need covered?

Cover requirements vary significantly by phase. A primary school primarily needs QTS-qualified class teachers and teaching assistants. A secondary school may need subject-specific cover teachers, HLTAs who can manage lessons independently, and learning support staff. A nursery needs Level 3-qualified practitioners and room leaders.

Make sure any provider you work with can supply the full range of roles you need — not just teachers. Many traditional partners are weaker on TA and early years supply than they are on teacher cover.

The main routes for finding supply teachers

Traditional supply partners

The established model. A traditional partner maintains a database of local supply staff and acts as an intermediary between school and educator. When you call with a need, they work through their list and confirm someone for you.

The advantages are familiarity and a personal relationship with a consultant who knows your school. The trade-offs are significant: mark-ups of 20–30% on the educator's pay rate are typical, response times depend on a human being being available to make calls, and visibility into who you're getting and what they're being paid is limited.

Many schools work with several partners simultaneously to ensure enough coverage — which adds administrative complexity without necessarily improving reliability.

Digital supply platforms

Platforms like Humly operate differently. Rather than a consultant making calls, the platform pushes your need to every suitable, available, DBS-checked educator in your area simultaneously. Matching happens in minutes rather than hours. You see educator profiles, reviews from other schools, and the rate before you confirm anyone.

The cost model is more transparent — you know exactly what you're paying, and platform fees are typically lower than traditional mark-ups. For most schools, the combination of speed, transparency, and cost makes a digital platform the stronger primary option.

Direct hiring

Some schools build a list of supply educators they've worked with directly and contact them independently. This bypasses provider fees entirely but creates significant compliance risk — you're responsible for verifying DBS status, right to work, and references yourself, and you take on the employment administration that a partner or platform would otherwise handle.

Direct hiring works as a supplement to a formal provider arrangement — if a school has educators they know and trust, some platforms allow you to request them specifically — but it's not a reliable primary strategy, particularly for emergency cover.

Supply teacher pools and local authority arrangements

Some local authorities maintain supply teacher pools that schools can access at reduced cost. These vary considerably in quality, availability, and the range of roles covered. If your LA runs one, it's worth understanding what it offers — but in many areas, these pools have reduced in size and reliability over the past decade and should not be relied upon as a primary source.

What to look for in a supply provider

Not all providers are equal. These are the questions worth asking before you commit to any arrangement.

Safeguarding and compliance

This is non-negotiable. Any provider placing staff in your school must be able to confirm that every educator they send has:

• A current enhanced DBS check, ideally on the Update Service
• Verified right to work in the UK
• Two professional references checked and on file
• Qualifications verified (QTS, Level 3, HLTA status as appropriate)

Ask how compliance is managed and how recently records were checked. A reputable provider will have clear, auditable answers. If a provider is vague about compliance, that is a serious red flag.

Speed of response

For emergency cover, how fast can they confirm someone? The window between a 6am absence call and the start of the school day is short. Test a provider's emergency response before you rely on them — ask what their average confirmation time is for same-morning requests, and what happens if they can't fill a need.

Quality and consistency

Can you request specific educators you've worked with before? Do you get any visibility into who you're getting before they arrive? Can you leave feedback after a booking? A provider that enables you to build a preferred pool of educators you trust is far more valuable than one that sends you a different unknown face every time.

Transparency on costs

Do you know exactly what you're paying before you confirm a booking? Pricing surprises — additional charges, variable mark-ups, invoice discrepancies — are a common frustration with traditional partners. A good provider gives you a clear, fixed rate upfront for every booking.

Range of roles

Can they supply QTS teachers, HLTAs, Level 3 TAs, nursery nurses, and SEN support workers — or only teachers? A provider that covers your full staffing need is more valuable than several specialist providers you have to manage separately.

Building a preferred pool of supply staff

The most reliable supply strategy is not having a great provider — it's having a group of educators your school knows, trusts, and can request directly. A provider is how you find those people. Your preferred pool is what you build over time.

How to build it

When a supply educator has a good day at your school, note their name. Leave feedback on the platform. Request them specifically next time. Most platforms — including Humly — allow you to mark educators as preferred and surface them first when you have a need.

Over time, a core group of four or five educators who know your school, your pupils, and your systems is worth more than any partner relationship. They're reliable. They require no briefing on how your school works. And pupils respond better to a familiar face than to a stranger every time.

What makes a good repeat booking relationship

The supply educators most worth rebooking share a few consistent qualities: they arrive on time, follow your school's systems without needing to be managed, leave a clear handover, and treat your pupils with the same professionalism they'd bring to a permanent role. When you find someone like that, make it easy for them to come back.

Managing supply costs effectively

Supply spending is a significant line in most schools' budgets — and one that's often managed reactively rather than strategically. A few principles that help.

Track your absence patterns over a full academic year. Understanding when absences peak — January and February are typically the highest months for illness — lets you plan proactively rather than scrambling reactively.

Use a single primary provider where possible. Managing multiple partner relationships adds administrative overhead and makes it harder to build preferred pools or negotiate consistent rates.

Consider long-term placements for extended absences. For a planned absence of more than a few weeks, a long-term supply arrangement — where you agree a rate with a specific educator for the duration — is typically cheaper than repeated day bookings and produces better outcomes for pupils.

Review your supply spend quarterly. Understand what you're paying per role type, how it compares to the previous year, and whether the provider you're using is still the best option available.