How Education Works | Teacher Continuing Professional Learning, CPD & Professional Renewal — How Qualified Teachers Keep Building Capability Across a Career

HEW-NODE-0200 · How Education Works · Teacher continuing professional learning, CPD and professional renewal

A teaching qualification answers an important question: has this person reached the threshold required to begin professional practice?

It does not answer a much harder question: how will that teacher remain capable when the curriculum changes, new evidence emerges, classrooms become more diverse, assessment rules shift, technology changes, new subjects appear, student needs change and the teacher moves from beginner to experienced practitioner to mentor or leader?

That is the job of teacher continuing professional learning.

It is sometimes called continuing professional development, CPD, professional development, in-service training, staff development or professional learning. The labels differ. The systems problem is the same: a profession whose work changes cannot rely on what its members knew on the day they qualified.

This node has a deliberate boundary. Teacher Induction, Mentoring & Probation owns the transition into supported professional practice. Instructional Supervision & School Support Visits owns the middle-tier support relationship with schools. Teacher Qualification Recognition, Registration Reciprocity & Cross-Border Mobility owns recognition of professional eligibility across jurisdictions. Teacher Workload, Task Allocation & Role Design owns the allocation of professional work. This page owns what happens after qualification: the career-long system that keeps teacher knowledge, judgment and practice developing rather than slowly becoming historical.

Quick Answer

Identify changing learner and curriculum needs → diagnose teacher and school learning needs → protect time for professional learning → offer several high-quality learning routes → connect learning to subject knowledge and classroom practice → let teachers rehearse, observe, discuss and receive feedback → support transfer into real lessons → revisit the change after implementation → recognise meaningful development without reducing it to attendance hours → make access equitable across schools and career stages → evaluate whether the learning changed capability → feed evidence back into future professional-learning priorities.

The central idea is simple: professional learning is not something done to teachers between lessons. It is part of how a teaching system keeps teaching competent.

Qualification Is a Starting Threshold, Not a Lifetime Warranty

A newly qualified teacher may understand curriculum, pedagogy, assessment, subject knowledge, classroom management and professional ethics at the level expected for entry. Ten years later, some of those foundations remain durable. Others need extension or revision.

A mathematics teacher may need to teach a redesigned syllabus. A language teacher may work with a larger range of multilingual learners. A science teacher may need new laboratory-safety procedures. A primary teacher may encounter new screening practices. Every teacher now works in a world where digital tools, generative systems and online information alter what students can produce and what teachers need to verify.

A strong system therefore treats professional competence as something maintained through use, reflection, evidence and renewal.

Professional Learning Is Broader Than a Course

A course can be valuable. It is only one learning format.

• subject seminars;
• lesson study;
• coaching;
• mentoring;
• peer observation;
• professional learning communities;
• curriculum design work;
• assessment moderation;
• action research;
• workplace inquiry;
• microcredentials;
• online modules;
• professional conferences;
• school networks;
• industry attachment;
• university study;
• and disciplined self-study.

The useful question is not, “Did the teacher attend training?” It is, “What professional capability was supposed to become stronger, what learning experience was designed to strengthen it, and what evidence shows that the learning reached practice?”

CPD Hours Measure Exposure, Not Necessarily Learning

Many professions use required hours or credits because they are administratively visible. Hours can show that time was allocated. They do not prove that a teacher learned something useful, retained it, applied it or improved student learning.

A six-hour workshop can transform practice. Another six-hour workshop can be forgotten before Monday morning. Systems need a way to record participation without confusing the record with the result.

The First Step Is a Good Needs Signal

Professional learning works better when the system can explain why a learning need exists.

Signals can come from curriculum change, teacher self-assessment, student work, classroom observation, new technology, assessment moderation, subject-network discussions, school improvement priorities, safety incidents, inclusion needs, research findings or workforce transitions.

No single signal should own the whole agenda. A teacher’s development should not become a direct derivative of test scores, nor should system priorities ignore what teachers themselves can see in their classrooms.

Teacher Judgment Belongs in the Needs Analysis

Teachers are not merely recipients of centrally designed training. They have first-hand information about where their practice feels uncertain, which student responses they cannot yet interpret, which subject areas need depth and which classroom routines are failing.

A professional-learning plan is stronger when it combines system requirements with professional self-direction.

System Priorities Still Matter

Teacher agency does not mean every teacher learns only what they prefer.

If a jurisdiction changes safeguarding rules, assessment procedures, curriculum standards or accessibility requirements, the system can legitimately require common professional learning. Shared obligations need shared understanding.

The design challenge is to distinguish mandatory common knowledge from elective professional growth rather than forcing everything into one compulsory catalogue.

Professional Learning Needs Protected Time

A system can say that teacher development is important while scheduling it into the hours that remain after teaching, marking, preparation, meetings, administration and family life.

That is not a professional-learning system. It is an aspiration competing with exhaustion.

Protected time can be created through scheduled professional-learning days, common planning periods, release time, reduced teaching loads for defined development activity, substitute coverage, network days or structured collaboration periods.

The neighbouring Teacher Time and Teacher Workload nodes explain why this matters operationally: time is a real resource, not a motivational slogan.

Subject-Specific Learning Matters

Generic teaching advice has limits.

Teaching fractions is not the same professional problem as teaching historical argument, phonemic awareness, chemical equilibrium, literary interpretation or computer programming. Strong professional learning often goes deep into the interaction between subject knowledge and how learners commonly misunderstand that subject.

This is where pedagogical content knowledge becomes powerful: teachers learn not only more of the subject, but better ways to represent it, diagnose errors and sequence explanations.

Curriculum Reform Creates a Professional-Learning Chain

A new curriculum document does not implement itself.

Teachers need to understand the rationale, progression, new content, removed content, expected depth, assessment implications, resources and how the changes interact with what students learned previously.

Curriculum rollout should therefore include professional learning early enough for teachers to prepare before students arrive. The canonical Curriculum page owns curriculum selection and sequencing; this node owns the teacher-learning infrastructure needed to make a changed curriculum teachable.

Assessment Change Needs Professional Learning Too

Teachers can understand a curriculum and still misinterpret a new assessment standard.

Moderation, exemplar analysis, joint marking and discussion of borderline work can help teachers calibrate judgments. The purpose is not to make every teacher think identically. It is to make the meaning of standards more stable across classrooms.

Observation Can Turn Abstract Advice Into Visible Practice

“Use better questioning” is weak guidance until a teacher can see what better questioning looks like in a real lesson.

Demonstration lessons, video examples, peer observation and instructional coaching allow professional knowledge to become observable. Teachers can notice timing, wording, transitions, student responses and the small decisions hidden inside apparently simple practice.

Observation Needs Psychological and Professional Safety

If every observation feels like an inspection, teachers may avoid experimentation and perform a safe “show lesson.”

Systems should distinguish developmental observation from formal appraisal where possible, explain who sees the evidence and create space for teachers to test an approach without assuming that every imperfect attempt is incompetence.

Coaching Works Through Repeated Cycles

Coaching is not one conversation after one lesson.

Set a narrow practice goal → plan → teach → observe or collect evidence → discuss what happened → make one or two changes → teach again → compare → retain, revise or abandon the change.

Its strength is the short distance between professional learning and the next opportunity to use it.

Mentoring Continues Beyond Induction

Mentoring is often associated with beginners, but experienced teachers also benefit when moving into a new subject, leadership role, specialist responsibility or unfamiliar student population.

The relationship changes: less “here is how the school works,” more professional dialogue around judgment, complexity and role transition.

Professional Learning Communities Can Make Knowledge Collective

A school improves faster when useful knowledge does not remain inside one classroom.

Professional learning communities can use student work, lesson plans, common misconceptions, assessment evidence and research to investigate a shared teaching problem. The important word is learning. A weekly meeting becomes professional learning only when it produces disciplined inquiry rather than another administrative agenda.

Lesson Study Makes the Lesson an Object of Inquiry

Teachers can jointly identify a learning goal, design a lesson, observe student responses, analyse evidence and revise the lesson.

The unit of improvement is not the teacher’s personality. It is the interaction among task, explanation, sequence, student thinking and evidence.

Professional Learning Should Connect to Research Without Worshipping It

Research can challenge intuition, estimate likely effects and reveal mechanisms. It cannot specify every decision in every classroom.

Teachers need research literacy: enough to ask what population was studied, what outcome was measured, how large the effect was, what implementation conditions mattered and whether the result transfers to their context.

Digital Education Creates a Continuing Learning Obligation

The OECD’s 2025 work on continuing professional learning for digital education makes a useful distinction: effective digital teaching is not simply traditional pedagogy transferred onto a screen. Teachers need to decide when a digital tool changes representation, feedback, collaboration, accessibility or assessment—and when it simply adds friction.

Professional learning therefore needs to cover digital pedagogy, not just button-clicking.

Generative Systems Raise New Professional Questions

Teachers increasingly need to reason about authorship, evidence, privacy, assessment design, hallucinated information, bias, accessibility and the difference between assistance and substitution.

A one-off technology briefing cannot settle those questions permanently. The tools and their classroom uses change too quickly. Schools need recurring professional dialogue, examples and policy interpretation.

Inclusion Requires More Than Good Intentions

Teachers may need continuing learning in language development, disability access, differentiated instruction, universal design, trauma-aware practice, behaviour support and collaboration with specialist professionals.

The canonical Special Education and Educational Equity pages own those wider systems. Professional learning is the route by which classroom staff keep the necessary practical knowledge current.

Professional Learning Has Career Stages

An early-career teacher may need classroom routines, curriculum interpretation and feedback on basic practice. A mid-career teacher may need subject leadership, curriculum design, mentoring or specialist expertise. A veteran teacher may need renewal, advanced inquiry, leadership development or support adapting to major technological and policy change.

A flat catalogue that offers everyone the same introductory workshops wastes expertise and makes professional learning feel repetitive.

Experienced Teachers Can Become Knowledge Infrastructure

Systems can use skilled teachers as mentors, coaches, subject leads, demonstration teachers, curriculum writers and network facilitators.

This does two things at once: it recognises professional expertise and creates a mechanism for distributing it.

But Expertise Needs Calibration

Longevity alone does not make someone an effective coach. A strong classroom teacher may need additional capability in observation, feedback, adult learning and facilitation before supporting peers.

School Leaders Shape the Learning Environment

Leaders decide whether professional learning receives time, whether collaboration is protected, whether mistakes can be discussed honestly, whether external courses are followed up and whether teacher expertise is used strategically.

The neighbouring Educational Leadership page owns leadership more broadly. Here the key point is that professional learning is partly an organisational-design problem.

Provider Quality Matters

Once professional learning becomes a market, schools can buy attractive workshops that are weakly connected to evidence or practice.

Systems can assess providers and programmes against clear aims, facilitator expertise, evidence base, learning design, opportunities for practice, follow-up support, accessibility and participant evidence.

Procurement Should Buy Learning Design, Not Celebrity

A famous speaker can inspire. Inspiration is not the same as capability development.

When schools procure professional learning, specifications should describe the professional problem, target participants, expected practice changes, follow-up requirements and evidence of quality. Price and reputation should not substitute for fit.

Microcredentials Can Make Small Learning Visible

Short recognised programmes can help teachers build specialised capability without committing immediately to a full postgraduate qualification.

But a stack of badges can become another attendance ledger. A useful microcredential should state the capability, assessment, issuer and evidence behind the award, with a clear relationship to larger professional pathways where applicable.

Postgraduate Study Is One Route, Not the Whole System

Masters programmes, specialist diplomas and doctoral study can deepen knowledge, research capability and leadership. They are intensive and valuable for some roles. Most day-to-day professional learning still occurs closer to practice through smaller cycles.

Professional Portfolios Can Capture Development Over Time

A portfolio can include learning goals, course evidence, lesson artefacts, inquiry notes, peer feedback, curriculum work and reflection.

The portfolio should not become a scrapbook assembled for compliance. Its purpose is to make professional growth legible to the teacher and, where appropriate, to the profession.

Registration Renewal and Professional Learning Should Not Be Confused

Some jurisdictions connect ongoing registration or licence renewal to professional-development evidence. That can create a minimum floor.

Yet the regulatory question—“Has the teacher met the requirement to remain registered?”—is narrower than the learning question—“What capability should this teacher build next?” A profession needs both compliance and growth without pretending they are identical.

Mandatory Learning Needs a Clear Reason

Compulsory professional learning makes sense where every teacher needs a common update: safeguarding law, assessment security, emergency procedures, curriculum implementation or professional conduct.

Mandatory status should not be used simply because a central office wants high attendance. Overuse creates compliance fatigue and crowds out teacher-directed development.

Equitable Access Is a System Responsibility

Teachers in large urban schools may have universities, subject networks, specialist staff and multiple course providers nearby. Teachers in small, rural or remote schools may have none.

Equity can require travel support, online access, regional networks, mobile specialist teams, common release days, shared coaching capacity and funding formulas that recognise distance.

Online Professional Learning Expands Access but Does Not Eliminate Design Problems

Recorded modules are scalable. They can also become passive and isolated.

Strong online learning can include cases, practice tasks, peer discussion, live coaching, feedback and a classroom implementation assignment. The medium changes; the need for active learning does not.

Professional Learning Has a Real Cost

The course fee may be the smallest part.

• teacher release time;
• substitute coverage;
• travel;
• facilitation;
• digital platforms;
• coaching capacity;
• materials;
• network coordination;
• credential fees;
• and the opportunity cost of other work.

A system that budgets only for the workshop and not for transfer into practice is buying an event rather than a learning process.

Professional Learning Must Survive Workload Pressure

Even high-quality development can fail when teachers return to overflowing workloads and have no time to redesign a lesson, observe a colleague or review student work.

Implementation therefore belongs inside professional-learning design. What will the teacher stop, start or change next week? What resource is needed? Who will support the first attempts?

Transfer Is the Point Where Training Becomes Practice

Professional learning is incomplete when the teacher understands an idea but the classroom remains unchanged.

Learn → rehearse → adapt to context → use with students → collect evidence → receive feedback → refine → repeat until the new capability becomes reliable.

This is why isolated workshop days often disappoint: the hardest work begins after the presentation ends.

Implementation Support Can Be Very Small and Still Powerful

A follow-up observation, a shared planning template, a ten-minute coaching conversation, a common student task or a scheduled review two weeks later can be enough to keep new learning alive.

The system does not always need more content. It often needs a better return path from content to use.

Evidence of Professional Learning Should Match the Claim

If the claim is “teachers attended,” attendance records are enough.

If the claim is “teachers understand the new assessment standard,” a calibration task may be better evidence.

If the claim is “teachers changed questioning practice,” lesson observation or artefacts may be relevant.

If the claim is “student learning improved because of the programme,” the evidence burden is much higher and needs comparison, timing and alternative explanations.

Student Outcomes Matter but Should Not Be Used Carelessly

Ultimately teacher learning should support better student experiences and learning. But a student score is influenced by many things: prior knowledge, attendance, curriculum, peers, resources, home circumstances, assessment design and time.

Professional-learning evaluation should therefore use multiple levels of evidence instead of claiming that one workshop “caused” an examination increase.

A Useful Evaluation Ladder

1. Did participants access and complete the learning?
2. Did they understand the intended knowledge or practice?
3. Could they rehearse or demonstrate it?
4. Did they use it in real work?
5. Did implementation persist?
6. Did the school’s collective capability change?
7. Did relevant student experiences or outcomes improve?
8. Were any harms, burdens or opportunity costs created?

Each rung asks a different question. Skipping directly from attendance to student outcomes hides the mechanism in between.

Professional-Learning Data Should Not Become a Surveillance Machine

Systems may record courses, credits, teacher interests, observation cycles and professional goals. That information can help plan provision.

It can also create distrust if every developmental conversation becomes permanent evaluative data. Systems should define purpose, access, retention and which information remains confidential to coaching relationships.

Aggregated Data Can Reveal System Gaps

If thousands of teachers request help with the same curriculum concept, that may reveal a weakness in rollout materials rather than a weakness in individual teachers.

If remote schools repeatedly miss professional learning because release teachers are unavailable, the problem is logistical. The data should help the system repair itself.

Networks Can Spread Useful Practice Across School Boundaries

Subject associations, school clusters, professional networks and communities of practice allow teachers to solve uncommon problems together and share specialist capability that no single school can maintain.

Networks are especially valuable for small subjects, rare specialisms and remote schools.

Scaling Professional Learning Is Not Copy-and-Paste

A programme that works with twenty volunteer teachers and one expert coach may fail when scaled to twenty thousand teachers with inconsistent facilitation.

Scaling requires facilitator development, common materials, quality assurance, local adaptation, scheduling capacity, data and a way to detect when the model is being diluted.

Professional Learning Can Support School Improvement Without Becoming the Whole Improvement Strategy

If a school’s timetable is impossible, textbooks are missing or leadership is unstable, more teacher courses will not solve the underlying problem.

The canonical School Improvement page owns the wider change system. Professional learning is one lever within it.

Worked Case: A New Mathematics Curriculum

A ministry introduces a mathematics curriculum with greater emphasis on reasoning and non-routine problems.

A weak rollout sends teachers a document and a webinar. A stronger rollout maps new content, develops worked examples and diagnostic tasks, trains subject leads, creates moderated lesson-study cycles and gives teachers access to exemplar student responses.

Schools then review whether lessons have actually shifted from procedural rehearsal to explanation and reasoning. The professional learning is connected to the curriculum mechanism rather than merely announcing the reform.

Worked Case: Digital Assessment Arrives

A school introduces an online assessment platform. Initial training teaches teachers how to create accounts and assign tests. Usage rises, but feedback quality does not improve.

The school redesigns professional learning around interpretation: item-level evidence, misconceptions, question quality, when not to use the platform and how to convert results into the next lesson.

The technology lesson becomes a pedagogy lesson.

Worked Case: A Rural Teacher Cannot Leave School for Training

A teacher in a small rural school teaches two subjects and cannot travel three days for regional courses without cancelling lessons.

The system combines asynchronous subject modules, monthly live network sessions, one termly in-person day and remote coaching. Travel funding is concentrated where physical practice matters most.

Equity means redesigning access, not simply publishing the same course catalogue for everyone.

Worked Case: A Veteran Teacher Needs Renewal, Not Remediation

An experienced teacher has strong classroom practice but feels professionally stagnant. The school does not send the teacher back to beginner workshops.

Instead, the teacher leads a lesson-study group, completes advanced subject study and works with a university partner on a classroom inquiry. Expertise is extended rather than treated as a deficit.

Worked Case: Mandatory CPD Has Become a Checkbox

A jurisdiction requires a fixed number of annual hours. Teachers accumulate certificates from short webinars chosen mainly because they are convenient.

The system keeps a modest participation floor but adds professional goals, recognised collaborative learning, evidence of implementation and higher-quality provider standards. Hours remain visible, but they stop pretending to be the definition of professional growth.

Failure Mode: One Workshop Is Expected to Change Practice

The repair is rehearsal, follow-up, coaching, implementation time and a scheduled return to evidence.

Failure Mode: Every Teacher Gets the Same Training

The repair is a common mandatory floor plus differentiated pathways by subject, role, career stage and diagnosed need.

Failure Mode: CPD Is Counted Only in Hours

The repair is to record hours where required while also asking what capability was learned, demonstrated and sustained.

Failure Mode: Training Happens Outside Working Time

The repair is protected time, release arrangements and workload design that treats professional learning as part of professional work.

Failure Mode: Professional Learning Is Completely Top-Down

The repair is a mixed model combining system obligations, school priorities and teacher-directed growth.

Failure Mode: Professional Learning Is Completely Self-Selected

The repair is to preserve teacher agency while ensuring common capability where curriculum, safety, inclusion or professional standards require it.

Failure Mode: Provider Reputation Replaces Quality Assurance

The repair is transparent programme standards, participant evidence, follow-up and periodic evaluation of whether provision reaches practice.

Failure Mode: Observation Feels Like Punishment

The repair is a clear boundary between developmental observation and formal appraisal, with confidentiality rules and agreed learning goals.

Failure Mode: New Learning Dies Under Workload

The repair is implementation planning: time, resources, coaching and a deliberately small number of practice changes.

Failure Mode: Student Scores Are Used as the Only Evaluation

The repair is a chain of evidence from participation to teacher learning, practice, persistence and relevant student outcomes, interpreted with causal humility.

Failure Mode: Remote Teachers Receive Fewer Opportunities

The repair is differential funding, network design, digital access, travel support and regional capacity rather than nominal equality.

Failure Mode: Every Development Record Becomes Appraisal Data

The repair is purpose limitation: define which evidence is for growth, which is regulatory, who can see it and how long it is kept.

What a Strong Teacher Professional-Learning System Should Be Able to Answer

• What professional capabilities are changing or newly required?
• Which needs are system-wide and which are local?
• How can teachers identify their own development priorities?
• Which learning is mandatory and why?
• Which learning is elective?
• Is protected time available?
• How is release coverage funded?
• Are subject-specific opportunities available?
• Can teachers observe effective practice?
• Can they rehearse before full classroom implementation?
• Is coaching available where appropriate?
• Do professional learning communities investigate real teaching problems?
• Are facilitators trained to work with adults?
• Are providers quality-assured?
• Do procurement criteria describe the professional problem rather than merely the event?
• Are online routes accessible and active rather than passive?
• Can remote and small-school teachers participate equitably?
• Are career stages recognised?
• Can experienced teachers contribute as mentors and leaders?
• Are microcredentials or formal study connected to coherent pathways?
• Does any registration requirement remain proportionate?
• What evidence shows learning occurred?
• What evidence shows practice changed?
• Was implementation sustained?
• How are student outcomes interpreted without simplistic attribution?
• What did the programme cost including teacher time?
• What professional-learning data is collected?
• Who can see developmental evidence?
• How does system data reveal gaps in access?
• How does feedback improve future provision?
• Which low-value activities should be stopped?

A Practical Professional-Learning Control Loop

Sense change → diagnose capability need → agree priority → protect time → choose learning design → build knowledge → see examples → rehearse → use in real teaching → collect evidence → discuss with peers or coach → refine → repeat → recognise durable capability → evaluate cost and effect → share what worked → revise the next professional-learning offer.

How This Node Connects to the Wider Education System

Teacher professional learning is the renewal mechanism between a profession and a changing world. It connects qualification to practice, curriculum to implementation, research to judgment, technology to pedagogy and school improvement to the people who must actually change what happens in classrooms.

Useful neighbouring routes include the main How Education Works hub; Teacher Induction, Mentoring & Probation; Teacher Workload, Task Allocation & Role Design; Instructional Supervision & School Support Visits; School Improvement; Quality Assurance in Education; and Educational Leadership.

Frequently Asked Questions

Is CPD the same as professional learning?

They are often used interchangeably. “Professional learning” emphasises the change in professional capability, while CPD is often used for formal courses, hours or recognised development activity. A strong system treats formal CPD as one route within a broader learning ecology.

Should teachers be required to complete a fixed number of hours?

A jurisdiction may use hours as a minimum participation requirement. Hours are easy to verify but do not prove impact. They work best as a floor alongside evidence of relevant learning and professional practice.

What makes professional learning effective?

There is no single format for every purpose. Strong designs usually connect to a real professional need, include relevant content, active practice, examples, collaboration or feedback, enough duration for implementation and a route back to classroom evidence.

Can online professional learning be high quality?

Yes. Online delivery can expand access substantially. Quality depends on learning design: cases, discussion, practice, feedback, coaching and implementation tasks generally create more professional learning than passive video completion alone.

Should professional learning affect teacher appraisal?

Systems should distinguish growth from judgment. Some evidence may legitimately demonstrate professional requirements, but confidential coaching and experimentation need enough protection that teachers can expose uncertainty and learn.

Sources and Further Reading

• OECD — Teacher Professional Learning: Drawing Upon International Practice for a Future Vision for Ukraine, 18 December 2025. A broad comparative treatment of teacher learning across the career and the infrastructure needed to sustain it.
• OECD — Teacher Professional Learning and Development, current policy overview treating teacher development as career-long learning rather than a one-time preparation stage.
• OECD — Preparing Teachers for Digital Education: Continuing Professional Learning on Digital Skills and Pedagogies, 26 May 2025. Examines continuing learning formats, enabling policy and quality mechanisms for digital education.
• OECD — Policies to Support Teachers’ Continuing Professional Learning. Framework for efficient, equitable and sustainable professional-learning systems.

Final Thought: A Profession Stays Professional by Continuing to Learn

Education systems often speak about teachers as their most important resource. If that statement is serious, the system must invest not only in recruiting and qualifying teachers, but in keeping professional capability alive over decades.

The world will keep changing. Curricula will change. Student populations will change. Technology will change. Evidence will change. Schools will face new expectations and old problems in new forms.

The stable answer cannot be to train a teacher once and hope experience automatically produces expertise.

Experience becomes expertise when practice is examined, knowledge is renewed, feedback is usable, time exists to improve and a profession can learn collectively from what its members discover.

That is how continuing professional learning works: not as an annual interruption to teaching, but as the mechanism that keeps teaching worthy of professional trust.