
Teams behaviour T5
Mastering Conflict
Artificial harmony hides real issues and weakens decisions. Make it safe to disagree about ideas, not people, then decide clearly and commit together.
Jump to T5 resources ↓What this behaviour looks like
Disagree and commit
A leader sets norms for respectful challenge, invites different views and keeps disagreement on ideas and evidence, not personalities. Once views are heard, the leader decides, explains why and asks everyone to commit, so colleagues, pupils and families see one clear direction.
A practical example
Discussing a new marking policy
Artificial harmony“So we're all happy with the new marking policy? Great. Let's move on to the next item.”
Constructive challenge“Before we decide, what might we be missing, and who sees this differently? Thank you, that workload point matters. I'll decide by Friday and explain my reasons, including how I have weighed workload. Then I'm asking all of us to commit.”
Ask who sees the marking policy differently before deciding.
Thank the colleague and weigh the workload point on its merits.
Decide by Friday, explain why, then ask everyone to commit.
Before sharing your own view, ask one question that invites challenge and respond without defending. Then close by stating the decision, the reasons and what you need everyone to commit to.
T5 · Resources for your setting
Put ‘Mastering Conflict’ into practice
Develop your own practice or lead the learning with your team. Use the chapter and workbook to explore the behaviour, then choose the resources that fit your next step.

Apply · Your leadership practice
Put it to work
Use the T5 Playbook to turn the behaviour into practical action on a real leadership challenge.
- Practical toolkit and coaching prompts
- A practice script to rehearse your approach
- A 90-day plan to guide your next steps
Members only · Explore membership →
Apply · Learning with your team
Lead a team session
Use the T5 INSET PowerPoint to help colleagues explore the behaviour and plan how to put it into practice.
- Editable slides to adapt to your setting
- Speaker notes to support facilitation
- Discussion, rehearsal and planning
Members only · Explore membership →
Completed Playbooks
See T5 applied in eight leadership contexts
Choose your role to explore the challenge, the leader’s response and the intended result. Members can read the complete example and download an editable Word copy.
In a primary school
In a secondary school
Across schools
Selected completed example
In a primary school · Headteacher
Settling a playground supervision dispute
Rachel · Headteacher · 402-pupil primary school
Worked example at a glance
Settling a playground supervision dispute
The challengePlayground incidents rose from 11 to 23 in one half term. Teachers propose fixed zones, lunchtime supervisors say adults need to move with pupils, and frustration is becoming personal outside meetings.
What the leader doesThe headteacher brings a real playground map and incident chronology, hears lunchtime supervisors before teachers frame the problem, stops dismissive language, makes decision rights clear and agrees a safe ten-day pilot.
What success looks likeBy day 30 every duty colleague should follow the agreed routines and the ten-day pilot should run safely; by day 60 incidents should fall from 23; by day 90 staff and pupils should find supervision clearer and safer.
Lucy · Deputy Headteacher for SEND and teaching · 656-pupil primary school
Worked example at a glance
Deciding where specialist support happens
The challengeTwelve pupils leave class for at least three interventions a week and five repeatedly miss the same subject. Colleagues fear that questioning either model will look like resisting inclusion.
What the leader doesThe deputy head replaces labels such as 'intervention-led' with a precise question about which pupils need which support, brings pupil and teaching-assistant evidence into the room, and agrees a bounded pilot with stop conditions.
What success looks likeBy day 30 six pilot pupils should have one coherent weekly plan; by day 60 at least five should show better access or independence without missing more core teaching; by day 90 every phase should use the two agreed classroom adaptations.
Sanjay · History Lead and Year 6 teacher · 214-pupil primary school
Worked example at a glance
Rebalancing an overloaded history curriculum
The challengeThe history map already overruns, yet a new draft adds a migration enquiry without removing anything. Real disagreement about coherence, local history and representation is being softened into additions nobody can teach well.
What the leader doesThe history lead puts two viable sequences and pupil work on the table, invites challenge to the lead's own preferred draft, agrees criteria for what stays or goes, and chooses one six-week Year 5 pilot.
What success looks likeBy day 30 the Year 5 pilot should have a complete six-week sequence; by day 60 at least 65% of sampled pupils should explain the chronological connection; by day 90 the team should decide the wider map and remove what does not earn its place.
Howard · Headteacher · 1,300-pupil secondary school
Worked example at a glance
Testing a phone-free school day
The challengeThe senior team agreed a phone-free school day in principle, but faculty leaders doubt it can be enforced and pastoral leaders see welfare risks. Nobody has said this with the senior team present.
What the leader doesThe headteacher asks for the strongest case against the proposal out loud, tests it against agreed evidence rather than seniority, explains the decision will be made after the meeting, and makes clear disagreeing costs nobody anything.
What success looks likeBy day 30 a decision should be published with its evidence, trade-offs and the concerns that changed it; by day 60 a bounded pilot should test the rule safely; by day 90 leaders should show whether the benefits justify the costs.
Calum · Assistant Headteacher for teaching policy · 1,060-pupil secondary school
Worked example at a glance
Challenging a draft homework policy
The challengeOnly 41% of pupils can predict when homework will be set or reviewed, and disadvantaged pupils report twice as many access barriers. Several leaders believe the draft confuses uniformity with consistency.
What the leader doesThe assistant head invites open challenge to the draft, has leaders compare real tasks by learning purpose, hears practical-subject and SEND views before core subjects set the default, and ends with a bounded pilot.
What success looks likeBy day 30 four pilot faculties should publish a stable homework rhythm; by day 60 at least 75% of pilot pupils should explain their homework pattern; by day 90 the entitlement should improve learning and clarity without adding workload.
Naomi · Head of Year 11 · 1,570-pupil secondary school
Worked example at a glance
Resolving competing Year 11 interventions
The challengeFourteen of 34 priority pupils are in at least three extra sessions and six attended fewer than half. Subject leaders and pastoral colleagues disagree about whether reducing sessions lowers ambition.
What the leader doesThe head of year has the group examine one pupil's complete week, agrees a shared decision rule, presents pastoral evidence without softening it, and settles one coherent plan with a named owner for each pupil.
What success looks likeBy day 30 all 34 pupils should have one plan owner and no competing expectations; by day 60 attendance at prioritised sessions should reach 80%; by day 90 targeted gaps should close for 70% of pupils without worsening anxiety or attendance.
Elena · Head of Science · 1,410-pupil secondary school
Worked example at a glance
Resolving a science assessment disagreement
The challengeKey Stage 3 common tasks take about 14 marking hours per teacher each term and rarely change teaching. Experienced colleagues hold opposing positions and newer teachers have stopped contributing.
What the leader doesThe head of science tests two viable models against real pupil responses and workload, hears the evidence before defending the current model, reframes the 'data versus judgement' split and secures one Year 8 pilot.
What success looks likeBy day 30 every Year 8 teacher should use the agreed common assessment; by day 60 moderation variation should narrow below 8 percentage points; by day 90 the department should adopt a model that cuts assessment time by at least 25%.
Mina · Trust Director of School Improvement · twelve-school trust
Worked example at a glance
Allocating scarce improvement support
The challengeTwelve schools have requested 141 days of support but only 86 are available. Smaller schools fear their cohorts vanish in the averages, and some heads think influential schools have already shaped the answer.
What the leader doesThe director shares the decision question and school-level evidence in advance, separates what is fixed from what is open, holds back the central rationale so others can join the challenge, and publishes how risks will be reviewed.
What success looks likeBy day 30 all twelve heads should be able to explain the criteria and their package; by day 60 at least 90% of days should be used as intended; by day 90 targeted indicators should improve in nine schools, with no disadvantage by size.
The complete Playbook is for members
Turn this example into action
Read the full toolkit, coaching and practice scripts, and 90-day plan. Members can view the PDF here and download an editable Word copy.
Further reading
Recommended book
The Five Dysfunctions of a Team – Patrick Lencioni (2002)
This book strengthens your practice by showing how healthy conflict enables creativity, clarity and commitment.
References from the Everyone Succeeds book
- Lencioni, P.M. (2012) The Advantage: Why Organizational Health Trumps Everything Else in Business. San Francisco, CA: Jossey-Bass. Buy on Amazon ↗
- Jehn, K.A. (1995) 'A multimethod examination of the benefits and detriments of intragroup conflict', Administrative Science Quarterly, 40(2), pp. 256–282. View article ↗
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