Discover how research-backed professional learning can empower all teachers to help multilingual learners thrive through curriculum-anchored, practice-based, equity-focused support.

Across five major bodies of research—Learning Forward’s Standards, Student Achievement Partners’ Principles for High-Quality, Standards-Aligned Professional Learning, NCEL’s teacher preparation report, Carnegie’s Elements, LPI’s Effective Teacher Professional Development, and TNTP’s Mirage—a powerful message emerges:
But these reports also reveal an urgent truth: PL cannot be considered “high-quality” unless it directly and intentionally strengthens outcomes for multilingual learners (MLLs).
MLLs now comprise one of the fastest-growing student groups in U.S. public schools. Yet most professional learning systems were not built with them in mind. As Student Achievement Partners (SAP) notes, too much PL remains incoherent, misaligned, and divorced from daily instructional priorities. NCEL finds that teacher preparation rarely equips educators with the multilingual literacy and linguistic expertise foundational to equitable instruction.
This blog synthesizes the strongest findings across all sources and reframes them through one essential question:
What must professional learning look like if we want multilingual learners to thrive?
The research converges on three major principles: PL must be content-focused, teacher- and student-centered, and instructionally relevant, as articulated by SAP.
PL must build both content knowledge and pedagogical content knowledge within the actual instructional materials teachers use daily. Carnegie reinforces this: curriculum functions as the center of the instructional vision, shaping what teachers learn and how they practice it.
LPI finds that PL succeeds when teachers rehearse, receive feedback, and apply new learning in iterative cycles. SAP reinforces this through its requirement for “collaborative planning, observation, feedback, and continuous cycles of inquiry”.
Learning Forward and SAP warn that fragmented PD pulls teachers “in various directions—at times contradictory” with little sustained support. TNTP’s Mirage adds that districts often grossly overestimate the impact of PD investments.
Despite strong consensus on what works, major barriers remain.
NCEL reports that most preparation programs lack coursework in bilingual development, cross-linguistic transfer, and language acquisition.
Carnegie finds that PD regularly occurs in isolation, failing to equip teachers to use standards-aligned materials effectively.
TNTP found districts spend nearly $18,000 per teacher annually with little evidence of instructional growth.
SAP states that language demands are inseparable from content and must be intentionally addressed—but most PL avoids this work.
The convergence across these research efforts creates a rare moment of alignment—and a clear blueprint for improvement.
Carnegie shows that curriculum-based PL transforms instruction by giving teachers structured opportunities to study content and practice implementation.
LPI identifies rehearsal and coaching as non-negotiables.
NCEL clarifies that every teacher is a language teacher and must be prepared accordingly.
These principles already align with best practices for MLLs. When implemented well, they become equity levers.
This includes:
Teachers must practice:
This requires:
MLLs’ linguistic demands are not peripheral—they shape instruction across all disciplines.
When these principles come together, multilingual learners experience:
This is not incremental change.
It is transformational.
The research no longer leaves room for ambiguity:
If districts continue to offer disconnected workshops, monolingual teaching models, and siloed EL support, inequities will persist. But when systems adopt SAP’s principles—content-focused, teacher- and student-centered, and instructionally relevant—and apply them with the intentionality multilingual learners deserve, everything changes:
Multilingual learners are already doing the remarkable work of learning across languages. It’s time for our professional learning systems to rise to the level of their brilliance.
The question now is simple: Will we build the systems our multilingual learners deserve?
Carnegie Corporation of New York. (2020). The Elements: Transforming Teaching Through Curriculum-Based Professional Learning.
Darling-Hammond, L., Hyler, M., & Gardner, M. (2017). Effective Teacher Professional Development. Learning Policy Institute.
Learning Forward. (2022). Standards for Professional Learning.
National Committee for Effective Literacy (NCEL). (2022). Teacher Preparation for the Literacy Development of Multilingual Learners.
TNTP. (2015). The Mirage: Confronting the Hard Truth About Our Quest for Teacher Development.