The Four Missing Pieces of Pre-K SEL Frameworks

It is 9:15 on a Tuesday morning, and the substitute teacher has already lost the room. The lead teacher called in sick. One four-year-old is sobbing on the carpet. Two others are in a standoff over a single marker. Circle time has quietly collapsed. The substitute reaches for whatever behavioral support plan the room has — and finds nothing she can actually use.

That moment, repeated across countless Pre-K classrooms every week, is not a failure of any individual teacher. It is the predictable consequence of a field that has produced excellent individual components for early childhood behavior support but has never assembled them into the specific thing a real Pre-K classroom needs.

That conclusion comes directly from a recent scoping review of the literature on Pre-Kindergarten behavioral modification and social-emotional learning frameworks published between 2000 and 2024 [1].

Using established scoping-review methodology (PRISMA-ScR) [2], the review mapped the existing programs, identified what is documented to work, and isolated four specific structural gaps that, taken together, define what is missing.

This article walks through all four — what each gap is, why it matters, and why no current Pre-K SEL curriculum closes them together.

The Central Finding in 50 Words

The scoping review concludes that the Pre-K SEL field has strong, evidence-backed components — universal curricula, school-wide behavior systems, mindfulness practices, executive function training, and co-regulation approaches — but no single framework integrates all four features a typical Pre-K classroom requires: tiered support, an educator-friendly rubric, body-based regulation for ages 3 to 5, and substitute-ready protocols [1].

A Few Definitions Before We Start

Several technical terms recur in this discussion. Brief working definitions:

• Pre-K (Pre-Kindergarten): Early-childhood education settings serving children aged 3 to 5, including public Pre-K, Head Start, and licensed preschool.
• SEL (Social-Emotional Learning): Instruction that helps children recognize emotions, manage impulses, build relationships, and make responsible decisions.
• MTSS (Multi-Tiered System of Support): A framework that delivers progressively more intensive support based on student need — Tier 1 (universal), Tier 2 (targeted), Tier 3 (intensive).
• PBIS (Positive Behavioral Interventions and Supports): A school-wide tiered behavior framework originally developed for K-12 contexts [3].
• Somatic regulation: The capacity to recognize and respond to body-based signals of an emotional state — breath, muscle tension, heart rate — before those signals escalate.

With those in place, the four gaps come into focus.

The Four Missing Pieces at a Glance

Below is the central diagnostic table from the review [1]. Each row represents one operational feature; each second-column entry summarizes whether the current Pre-K literature actually provides it.

The last row is the central thesis of the entire review [1]. Each of the four features lives somewhere in the literature. None of the existing frameworks brings all four together in a single coherent design.

Missing Piece #1 — Tiered Architecture Built Inside the Curriculum

A four-year-old who is melting down in the block area on Tuesday is not the same as a four-year-old who simply needs a gentle redirect. Sound behavioral practice has long acknowledged this through tiered support: a universal layer for all children, a more targeted layer for those who need a little more, and an intensive layer for the few children who require sustained one-on-one intervention.

Tiered logic does exist in the Pre-K literature, but almost exclusively through PBIS, which Sugai and Horner describe as a school-wide, multi-tiered system originally built for K-12 contexts [3]. PBIS provides genuine structural rigor at the building level, but it is not a Pre-K SEL curriculum. It does not teach a three-year-old what frustration feels like, how to label it, or what to do when it floods the nervous system [1].

The most influential Pre-K SEL curricula — Second Step [4] and PATHS [5] among them — teach social and emotional skills but do not differentiate intervention intensity based on where a child is behaviorally on a given day. Every child receives the same lesson, the same prompt, and the same support, whether they are regulated or in distress [1].

The review’s framing is direct: tiering and SEL coexist in the same ecosystem but have never been integrated into a single framework where the tiers live inside the curriculum itself [1]. That integration — tiering not as a separate layer of school-wide procedure, but as something embedded in the lesson a teacher is already running — is what the literature lacks.

A21 — Tiered Support Inside the Curriculum (Gap 1)

Missing Piece #2 — A Rubric a Teacher Can Actually Use

The second gap concerns measurement, and its consequences travel far beyond any single classroom.

The dominant measurement approach across the Pre-K studies is a specialist-administered standardized assessment. The Social Skills Rating System, the Behavior Assessment System for Children (BASC-3), the Devereux Early Childhood Assessment (DECA), and the Strengths and Difficulties Questionnaire (SDQ) appear repeatedly in the literature [1]. These are rigorous instruments. They are also instruments that require specialized training, structured administration time, and specialist availability — none of which describes the operational reality of most Pre-K classrooms [1].

The review states the finding plainly: the screening identified no framework offering a validated rubric a classroom educator could use to score behavioral observations in under a minute as part of normal daily instruction. “Not one” [1].

The downstream consequence is structural. As the review puts it, “A framework without a built-in measurement tool is a framework that cannot build its own evidence base” [1]. Without educator-operable measurement, behavioral outcomes cannot be tracked over time, compared across settings, or used to generate the kind of data that policymakers and funders require to justify continued investment.

This is not a minor logistical complaint. It is the bottleneck that limits how the entire field grows.

A22 — A 60-Second Rubric (Gap 2)

Missing Piece #3 — Somatic Regulation Calibrated for Ages 3 to 5

A three-year-old whose nervous system is in a stress state cannot reason their way back to calm. They cannot retrieve a multi-step coping strategy, recite a sequence, or talk through how they feel — not because they are being defiant, but because the parts of the brain that handle that work go offline under stress.

Two streams of research converge on this point. Shanker’s self-regulation work emphasizes that ages 3 to 5 are a critical developmental period for somatic awareness — the capacity to recognize and interpret the physical signals of an emotional state [6]. Van der Kolk’s broader research on trauma and the body argues that body-based experience precedes and underlies language-based experience across the lifespan [7].

The implication for any preschool social emotional learning curriculum is concrete: self-regulation instruction has to start in the body — breath, muscle tension, heartbeat — before it can move into language. That is the developmental sequence that matches how a three-year-old’s nervous system actually works [1].

Some mindfulness-based programs in the literature — MindUP and CalmSpace, among them — do good somatic work and show gains in executive function and attention regulation [1]. But these programs sit outside any tiered structure, typically require specialist training, and do not generate classroom-level data. The somatic content exists. It is simply not embedded in a framework that also delivers the other three features.

A23 — Start in the Body (Gap 3)

Missing Piece #4 — A Protocol Any Substitute Can Run on Day One

The fourth gap is the one with the most direct equity implications.

Most existing Pre-K behavioral frameworks assume a trained implementer. Conscious Discipline, for example, requires deep and sustained professional development to use well [8]. PBIS assumes school-wide rollout and coaching [3]. The major Pre-K SEL curricula assume the lead teacher knows the lessons.

The review observes that when a lead teacher is absent — which happens with significantly higher frequency in schools serving low-income communities — frameworks that require trained implementation simply stop working [1]. The children who are already receiving the least consistent support get even less.

That has consequences that show up in federal data. The Yale Child Study Center found that Pre-K children are expelled at a rate three times higher than any other grade level in U.S. schools, with between 5,000 and 7,000 children removed from publicly funded Pre-K programs each year [9].

The U.S. Department of Education’s Civil Rights Data Collection found that Black Pre-K children are suspended at a rate 3.6 times higher than their White peers [10]. The review argues that those disparities widen specifically in the moments when no structured behavioral protocol is available — and that those moments concentrate in under-resourced settings [1].

A framework that runs the same way regardless of who is in the room is therefore not a convenience feature. The review calls it “a structural equity intervention” [1].

A24 — When the Substitute Walks In (Gap 4 / Equity)