It was a central theme in 2025. There is little reason to think this year will be any different: curriculum, sometimes with the prefix knowledge-rich, sometimes without. An international overview of curriculum policy by the Centre for Education Systems, with Lucy Crehan as lead author, is therefore a timely starting point for the new year. The report offers no silver bullets, avoids rankings, and explicitly rejects one-size-fits-all solutions. What it does provide is a systematic comparison of fourteen education systems. More importantly, it seeks to identify recurring patterns in how countries design and implement curricula.

One of the report’s immediate strengths is its dismantling of several false dichotomies. These dichotomies continue to shape curriculum debates as if systems must choose between knowledge and skills, between specificity and autonomy, between a common curriculum and differentiation. The analysis shows that these choices are far less black-and-white in practice. Countries combine elements, experiment, revise course, and repeatedly encounter the same underlying tensions.

One of the clearest findings concerns early differentiation. Systems that require students to choose, or that select students into different pathways at a young age, consistently see disadvantaged learners clustered into less academic tracks. This is not a moral judgment, but an empirical observation of patterns that recur across contexts. By contrast, systems that maintain a broad common curriculum until the age of 15 or 16 tend, on average, to show smaller socio-economic performance gaps. Delaying choice does not solve everything. However, the evidence suggests that early choice is rarely neutral.

The report also offers a valuable nuance to the debate on curriculum overload. Too much content is clearly a problem, but too little content is equally risky. An overloaded curriculum leads to superficial coverage or to selective teaching driven by assessment pressures. An under-specified curriculum, by contrast, can widen inequalities. This happens as access to important knowledge becomes increasingly dependent on what students encounter outside school. The authors explicitly refer to a “sweet spot”: a focused curriculum that allows time for depth, consolidation, and progression. This may sound self-evident. Yet, curriculum policy repeatedly drifts towards one extreme or the other.

Perhaps the sharpest section of the report concerns curriculum specificity. Systems with insufficiently concrete expectations about what students should learn—often introduced in the name of autonomy—consistently report the same problems: teacher confusion, increased workload, greater variation between schools, and more difficult transitions between educational stages. The logic is straightforward. When system-level guidance remains vague, curriculum design is effectively devolved to schools and individual teachers. This results in accompanying differences in expertise, capacity, and expectations. In practice, autonomy without sufficient guidance often functions as a mechanism for inequality.

At the same time, the report avoids equating greater specificity with higher quality. More detailed curricula do not automatically lead to better outcomes. What matters is how systems build flexibility into the framework. Some combine clear content expectations with choices, variable pacing, deliberate “white space,” or adapted pathways for students with additional learning needs. Autonomy, in this sense, does not reside only in what is prescribed, but also in how teaching is organised, sequenced, and enacted.

The report’s analysis of so-called cross-curricular skills will also resonate internationally. When systems add broad competencies or 21st-century skills without anchoring them clearly in subject disciplines, they almost inevitably create confusion. Teachers struggle to determine who is responsible. Under pressure to perform, these goals quickly slip into the background. This is not an argument against such skills, despite some readings of the report, but against the assumption that they will somehow emerge by being positioned everywhere and nowhere at once. Systems that embed them explicitly within subject curricula tend to be more successful.

After reading the report, the most striking conclusion is a sobering one. It finds relatively little difference in outcomes between different curriculum reform models. Whether reforms are participatory, expert-led, or politically driven, the formal design approach tells us surprisingly little about eventual success. What does recur consistently are the conditions for implementation: time, professional development, high-quality materials, and sustained support. Without these, even the most carefully designed curriculum risks devolving into superficial compliance.

That makes the report both reassuring and uncomfortable. Reassuring, because it suggests that many curriculum debates reflect structural tensions rather than local policy failure. Uncomfortable, because it leaves little room for quick fixes or persuasive rhetoric. Anyone serious about improving curriculum quality and educational equity will need to invest in coherence, support, and realistic expectations of what teachers can reasonably be asked to carry.