From Principle to Practice: Lessons I have learnt about Implementing Lesson Principles Well

Across many schools and trusts, there is now no shortage of teaching and learning frameworks, lesson principles, and instructional playbooks. In my own trust, I spent months creating a shared set of research-informed lesson principles, which aimed to build a shared mental model of what effective T&L looks like, while helping teachers build a repertoire of strategies to solve their persistent problems. You can see these below:

I thought it might be interesting to share what I have learnt this year on my implementation journey…

I spent a long time with leaders in each of our schools, doing the difficult thinking needed to define what effective teaching should look like. The challenge, though, is no longer simply deciding what we believe about great teaching. The more demanding question is how those beliefs become enacted consistently, thoughtfully, and sustainably in classrooms.

This is where implementation matters. Too often, lesson principles are treated as if their publication is the main achievement: write the framework, share the slides, run a launch event, and expect practice to shift. In reality, that is only the beginning. The hard part is not producing the document. It is getting reliable enactment in every classroom.

That difficulty becomes especially clear when schools or trusts try to scale a shared approach. Three tensions quickly emerge. The first is the tension between coherence and autonomy. Leaders want a common language and shared expectations across classrooms, but teachers work in different subjects, phases, and contexts. A routine that makes sense in Year 1 phonics may not look identical in Key Stage 4 science. The second tension is between consistency and adaptation. Schools need to protect the active ingredients of an approach, but they also need enough flexibility for the approach to be workable in local settings. The third tension is between urgency and capacity. Leaders often want momentum, but teachers need time, rehearsal, support, and clarity if new habits are to take hold.

If these tensions are ignored, lesson principles often fail in one of two ways. Either they remain too loose to make any meaningful difference, or they become so rigid that staff comply superficially without building deep ownership. In both cases, the gap between principle and practice remains.

A more productive way to think about this work is through the Education Endowment Foundation’s implementation model: explore, prepare, deliver, and sustain. What this model offers is not simply a sequence of steps, but a disciplined way of leading change. It reminds us that successful implementation depends not only on the phases themselves, but also on behaviours, systems, context, and the people enabling change. Implementation is not an event. It is a process.

The first task in that process is to become much clearer about what is actually being implemented. Many lesson principles remain too abstract. Phrases such as “high expectations”, “effective questioning”, or “responsive teaching” may sound compelling, but unless they are translated into observable classroom routines, they remain open to wide interpretation. For implementation to succeed, schools need to move from broad principles to specific practices.

There are at least three layers here. First are the lesson principles themselves: the shared beliefs about how learning works. Second are the instructional routines that embody those beliefs: the repeated teacher and pupil actions that can be practised and refined. Third comes exemplification and coaching: the modelling, rehearsal, feedback, and subject-specific examples that turn abstract expectations into something real. This is where leaders need to be both tight and loose. They should be tight on the core components, common language, and non-negotiable routines, but looser on the way these are exemplified in different subjects or phases. If the active ingredients remain vague, every later conversation about coaching, consistency, and adaptation becomes equally vague.

Explore

The explore phase is where disciplined implementation begins. Before standardising anything, leaders need to diagnose the problem carefully. What is the pupil need? What problem is the school or trust actually trying to solve? What already happens in classrooms, and what habits or norms are already shaping practice? What does the evidence suggest about effective responses to that need? And can the proposed approach work across the trust in practical terms?

These questions matter because schools can become very efficient at solving the wrong problem consistently. A playbook may be coherent and polished, but if it is not addressing a genuine need, or if it is not feasible in context, implementation will struggle from the start. A useful test at this stage is whether the proposed approach is evidence-informed, right for the setting, and feasible. If any one of those is weak, the answer may not be “never”, but it may well be “not yet”. In my own trust for example, despite my exeprtise in instructional coaching, we decided not to implement a whole-trust instructional coaching approach - quite simple because the culture and systems to do it well needed to be crafted first.

Prepare

Once the diagnosis is secure, attention turns to preparation. This is the phase where confidence is either built or confusion is created. Preparation requires precision. Leaders need to specify the core components clearly so staff understand what is essential and what can be adapted. They need more than a launch event: they need a multi-strand implementation package that combines training, modelling, rehearsal, coaching, prompts, and leadership reinforcement. They also need to prepare the systems around the work. Timetables, line management, professional development structures, and monitoring processes all need to support the intended change. Without this alignment, schools ask teachers to work differently while leaving the surrounding conditions unchanged.

Deliver

The deliver phase is where many promising strategies begin to wobble. First use is usually messy. That is normal. There is often an implementation dip in which confidence falls and practice becomes uneven. This should not be interpreted as evidence that the strategy is wrong. More often, it is part of the learning process. During this phase, the role of leaders is to support staff through first use. That means showing what strong enactment looks like, creating opportunities for rehearsal, offering coaching, and using feedback to strengthen fidelity over time. It also means remembering that attendance at training is not implementation. A document is not implementation. A launch is not implementation. Implementation happens when teachers try to use routines in real classrooms, refine them, and become more reliable over time.

Sustain

Sustainability is the final challenge. Too often, schools treat sustain as a passive phase, as if the work will now continue on its own. In reality, it must be actively embedded into systems. If lesson principles matter, they should appear in induction, ongoing professional development, coaching cycles, and leadership conversations. They need protection from initiative overload and shifting priorities. They also need intelligent review. Some elements should be strengthened, some adapted, and some stopped altogether. De-implementation matters as much as implementation. One of the most powerful decisions leaders can make is to do fewer things, more deeply.

This is particularly important in trusts, where implementation operates at several levels. Trust leaders define the active ingredients and align policy, communication, and professional development. School leaders create the conditions for consistent practice. Departments and phases translate the playbook into subject-specific exemplification and rehearsal. Teachers then use the routines in classrooms and adapt them intelligently in response to pupil need. Coherence does not mean identical practice everywhere. It means shared core components supported by thoughtful adaptation at each level.

If schools want lesson principles to become more than aspirational statements, they must stop treating implementation as a launch and start treating it as architecture. The goal is not simply to produce a beautiful playbook. It is to create the conditions in which that playbook becomes lived classroom practice. That requires clarity, sequencing, support, monitoring, and patience.

In the end, trust-wide consistency comes not from implementing everything at once, but from implementing fewer things more deeply. When active ingredients are clearly defined, systems are aligned around them, and the work is protected long enough for habits to form, lesson principles begin to live beyond the page. That is when they start to matter most: not as statements of intent, but as part of pupils’ daily experience of teaching and learning.