Strong but Incomplete: Pre-K SEL Framework Limitations

It is mid-morning in a Pre-Kindergarten classroom. The lead teacher is out, a substitute is filling in, and a four-year-old who was fine yesterday is now under a table refusing to come out. Somewhere on a shelf above her sits a binder containing the school’s adopted SEL curriculum. The substitute has never opened it. By lunch, the day is essentially gone.

That scene is the heart of what Ranya Omran’s 2026 scoping review documents at the level of literature [1]. The field is not short on frameworks. It has CASEL, Second Step, PATHS, Conscious Discipline, and PBIS — programs with real research behind them and real classrooms behind that research. What the field is short on is a framework that holds together when the room is dysregulated and the person standing in it is not the person who was trained.

The review’s central observation about this landscape is precise: Pre-K educators are currently choosing between programs that are evidence-based but operationally unsustainable, and programs that are operationally simple but evidence-poor [1]. Nobody, as the manuscript puts it, has yet built the thing in the middle.

This article unpacks that pattern. For curriculum developers, researchers, and administrators evaluating SEL curricula for preschool settings, the more useful question is not which framework is best, but where each one hits its operational ceiling — and what that ceiling reveals about the design constraints any future Pre-K framework will have to honor.

The trade-off pattern at a glance

To set up the analysis, it helps to name the four operational features the Omran review treats as essential for a Pre-K behavioral framework that can actually work at scale [1]:

1. Tiered (MTSS) intervention architecture embedded inside an SEL curriculum.
2. A standardized, quantifiable rubric a classroom educator can complete in under a minute.
3. Somatic self-regulation instruction calibrated for 3–5 year olds.
4. Substitute-teacher-ready scripted protocols.

Every framework discussed below has genuine strengths. Each one also misses at least one of these features in a way that has practical consequences for the classroom.

Second Step: scripted lessons, no tiering, no data

Second Step is the most widely scaled universal SEL curriculum in this category, reaching tens of thousands of classrooms [1][2]. Its design is built around scripted lessons, which is genuinely useful. A teacher can open the binder, read the script, and deliver the intended content. For schools with high turnover or inconsistent training, scripted material lowers the cognitive load on the educator and creates a baseline consistency across rooms.

The Omran review is clear about the structural limit, however [1]. Second Step has no tiered intervention architecture. Every child gets the same response regardless of where they are behaviorally on a given day. A child who is mostly regulated and a child who has been dysregulated for three weeks receive identical inputs from the curriculum [1][2].

That matters for two reasons. First, in any classroom, behavioral need is not evenly distributed; a small group of children typically requires more intensive support than the rest. Second, the program produces no standardized quantifiable data that a teacher could track over time or a researcher could analyze [1]. The curriculum teaches. It does not measure. That gap limits what teachers, schools, and the field can learn from its implementation.

For curriculum developers building or evaluating a research-based social emotional learning curriculum for preschool, Second Step is a useful reference point for what scripted content can do — and a cautionary case for what scripted content alone cannot do without an embedded tiering and measurement layer.

PATHS: a developmental mismatch for 3–5 year olds

PATHS — Promoting Alternative Thinking Strategies — has demonstrated measurable gains in emotional competence in school-aged children [3]. Greenberg, Kusche, Cook, and Quamma’s foundational 1995 study established that children completing the PATHS curriculum showed improvements in their understanding and discussion of emotional experiences [3]. As an SEL program, PATHS has earned its place in the literature.

The problem for Pre-Kindergarten is that PATHS was designed for elementary students [1]. Its emotional regulation strategies lean heavily on verbal and cognitive processing — naming, discussing, reasoning through emotional events. That register fits a seven-year-old’s developing language and metacognition. It does not consistently fit a three-year-old’s.

This is where Shanker’s self-regulation research becomes important [4]. The developmental literature suggests that children aged 3–5, especially in stress states, cannot access language-based regulation strategies the way older children can [1][4]. A child whose nervous system is flooded is not in a position to participate in a verbal discussion about her feelings. The Omran review labels this directly as a developmental mismatch [1].

For curriculum developers, the implication is not that PATHS is a weak program. The implication is that an SEL curriculum for preschool cannot be built primarily out of vocabulary and discussion. It has to start where a three-year-old’s regulation actually starts — in the body — and only later move into language [1][4]. PATHS demonstrates what is possible at one developmental stage and, by contrast, what is required at another.

Conscious Discipline: powerful mindset, prohibitive PD load

Conscious Discipline offers teachers a fundamentally different way to understand behavior [5]. Becky Bailey’s framework reframes challenging behavior as a regulation problem rather than a compliance problem, and it gives educators a stance toward children that many teachers describe as transformative for their practice [1][5]. As a mindset framework, it is one of the most respected in early childhood.

The Omran review names a different kind of limit here, one that is operational rather than theoretical [1]. Conscious Discipline requires deep, sustained professional development to implement well. A one-day workshop will not produce a Conscious Discipline classroom. The framework lives or dies on the depth of the teacher’s internalization of its principles.

That requirement makes it functionally inaccessible to any school with significant staff turnover — which, as the review notes, is to say most of the schools that need it most [1]. Early childhood settings have well-documented turnover, with multiple studies tracing direct links between unmanaged classroom behavior and teacher exhaustion, attrition, and educator workforce loss [6][7]. A framework whose effectiveness depends on years of cumulative PD is a framework that resets every time the staff list changes.

For administrators making procurement decisions, the question is not whether Conscious Discipline works when fully implemented. The evidence and educator testimony on that point are real. The question is whether your program has the staffing stability and PD budget to keep it implemented across a five-year horizon. For many sites, the honest answer is no.

A6 — The Major SEL and Behavior Frameworks Used Today

PBIS: school-wide architecture, not Pre-K somatic instruction

Positive Behavioral Interventions and Supports (PBIS) gives schools a multi-tiered system for responding to behavior, integrated with school-wide expectations and a defined intervention escalation pathway [8]. At the elementary level and above, the evidence for PBIS in reducing office discipline referrals and improving school climate is consistent [1].

The Omran review is careful here. PBIS provides exactly the tiered architecture that universal SEL curricula lack — but it was not designed as an SEL curriculum, and it was not designed for three- and four-year-olds [1]. Standard PBIS procedures carry verbal and cognitive processing demands that are too high for many Pre-K children, and the Pre-K-specific PBIS literature is noticeably thinner than the elementary literature, with implementation challenges tied to developmental appropriateness [1].

More fundamentally, PBIS is a behavioral management system, not a curriculum that teaches a four-year-old what frustration feels like in her body, or how to name it, or what to do when it floods her nervous system mid-activity [1]. It tells the school how to respond to behavior. It does not teach a child to read the early somatic signals of dysregulation before the behavior arrives. Van der Kolk’s work and Shanker’s self-regulation research both point to the same finding: children at this age are in a critical window for somatic awareness, and that awareness is built through body-first instruction rather than rule-based response [4][9].

For curriculum developers thinking through how MTSS principles might apply in Pre-K, PBIS is the template for tiering — and a worked example of why tiering, by itself, is not the same thing as developmentally appropriate Pre-K SEL.

Comparison: four frameworks against four operational features

Synthesized from the four operational features defined in the Omran scoping review [1].

The pattern across the row is what the Omran review names as the central finding of its gap analysis [1]. Tiering exists in PBIS but not inside an SEL curriculum. Scripted accessibility exists in Second Step and PATHS but not with tiering or data.

Mindset depth exists in Conscious Discipline but requires PD investment most schools cannot sustain. Body-based regulation exists in mindfulness programs but is rarely integrated with anything else — a point developed in A15 — Mindfulness in the Preschool Classroom and A18 — Why Combined Frameworks Work Better.