Category: teacher effectiveness

  • We built evaluation for accountability–now it’s time to build it for growth

    We built evaluation for accountability–now it’s time to build it for growth

    Key points:

    Teacher evaluations have been the subject of debate for decades. Breakthroughs have been attempted, but rarely sustained. Researchers have learned that context, transparency, and autonomy matter. What’s been missing is technology that enhances these at scale inside the evaluation process–not around it. 

    As an edtech executive in the AI era, I see exciting possibilities to bring new technology to bear on these factors in the longstanding dilemma of observing and rating teacher effectiveness.

    At the most fundamental level, the goals are simple, just as they are in other professions: provide accountability, celebrate areas of strong performance, and identify where improvement is needed. However, K-12 education is a uniquely visible and important industry. Between 2000 and 2015, quality control in K-12 education became more complex, with states, foundations, and federal policy all shaping the definition and measurement of a “proficient” teacher. 

    For instance, today’s observation cycle might include pre- and post-observation conferences plus scheduled and unscheduled classroom visits. Due to the potential for bias in personal observation, more weight has been given to student achievement, but after critics highlighted problems with measuring teacher performance via standardized test scores, additional metrics and artifacts were included as well.

    All of these changes have resulted in administrators spending more time on observation and evaluation, followed by copying notes between systems and drafting comments–rather than on timely, specific feedback that actually changes practice. “Even when I use Gemini or ChatGPT, I still spend 45 minutes rewriting to fit the district rubric,” one administrator noted.

    “When I think about the evaluation landscape, two challenges rise to the surface,” said Dr. Quintin Shepherd, superintendent at Pflugerville Independent School District in Texas. “The first is the overwhelming volume of information evaluators must gather, interpret, and synthesize. The second is the persistent perception among teachers that evaluation is something being done to them rather than something being done for them. Both challenges point in the same direction: the need for a resource that gives evaluators more capacity and teachers more clarity, immediacy, and ownership. This is where AI becomes essential.”

    What’s at stake

    School leaders are under tremendous pressure. Time and resources are tight. Achieving benchmarks is non-negotiable. There’s plenty of data available to identify patterns and understand what’s working–but analyzing it is not easy when the data is housed in multiple platforms that may not interface with one another. Generic AI tools haven’t solved this.  

    For teachers, professional development opportunities abound, and student data is readily available. But often they don’t receive adequate instructional mentoring to ideate and try out new strategies. 

    Districts that have experimented with AI to provide automated feedback of transcribed recordings of instruction have found limited impact on teaching practices. Teachers report skepticism that the evolving tech tools are able to accurately assess what is happening in their classrooms. Recent randomized controlled trials show that automated feedback can move specific practices when teachers engage with it. But that’s exactly the challenge: Engagement is optional. Evaluations are not. 

    Teachers whose observations and evaluations are compromised or whose growth is stymied by lost opportunities for mentoring may lose out financially. For example, in Texas, the 2025-26 school year is the data capture period for the Teacher Incentive Allotment. This means fair and objective reviews are more important than ever for educators’ future earning potential.

    For all of these reasons, the next wave of innovation has to live inside the required evaluation cycle, not off to the side as another “nice-to-have” tool.

    Streamlining the process

    My background at edtech companies has shown me how eager school leaders are to make data-informed decisions. But I know from countless conversations with administrators that they did not enter the education field to crunch numbers. They are motivated by seeing students thrive. 

    The breakthrough we need now is an AI-powered workspace that sits inside the evaluation system. Shepherd would like to see “AI that quietly assists with continuous evidence collection not through surveillance, but pattern recognition. It might analyze lesson materials for cognitive rigor, scan student work products to detect growth, or help teachers tag artifacts connected to standards.”

    We have the technology to create a collaborative workspace that can be mapped to the district’s framework and used by administrators, coaches, support teams, and educators to capture notes from observations, link them to goals, provide guidance, share lesson artifacts, engage in feedback discussions, and track growth across cycles. After participating in a pilot of one such collaborative workspace, an evaluator said that “for the first time, I wasn’t rewriting my notes to make them fit the rubric. The system kept the feedback clear and instructional instead of just compliance-based.”

    As a superintendent, Shepherd looks forward to AI support for helping make sense of complexity. “Evaluators juggle enormous qualitative loads: classroom culture, student engagement, instructional clarity, differentiation, formative assessment, and more. AI can act as a thinking partner, organizing trends, highlighting possible connections, identifying where to probe deeper, or offering research-based framing for feedback.”

    The evaluation process will always be scrutinized, but what must change is whether it continues to drain time and trust or becomes a catalyst for better teaching. Shepherd expects the pace of adoption to pick up speed as the benefits for educators become clear: “Teachers will have access to immediate feedback loops and tools that help them analyze student work, reconsider lesson structures, or reflect on pacing and questioning. This strengthens professional agency and shifts evaluation from a compliance ritual to a growth process.”

    Real leadership means moving beyond outdated processes and redesigning evaluation to center evidence, clarity, and authentic feedback. When evaluation stops being something to get through and becomes something that improves practice, we will finally see technology drive better teaching and learning.

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  • Teachers who use math vocabulary help students do better in math

    Teachers who use math vocabulary help students do better in math

    by Jill Barshay, The Hechinger Report
    January 5, 2026

    Students, parents and school principals all instinctively know that some teachers are better than others. Education researchers have spent decades trying — with mixed success — to calculate exactly how much better.

    What remains far more elusive is why.

    A new study suggests that one surprisingly simple difference between stronger and weaker math teachers may be how often they use mathematical vocabulary, words such as “factors,” “denominators” and “multiples,” in class.

    Related: Our free weekly newsletter alerts you to what research says about schools and classrooms.

    Teachers who used more math vocabulary had students who scored higher on math tests, according to a team of data scientists and education researchers from Harvard University, Stanford University and the University of Maryland. The size of the test score boost was substantial. It amounted to about half of the benefit researchers typically attribute to having a highly effective teacher, which is among the most important school-based factors that help children learn. Students with highly effective teachers can end up months ahead of their peers. 

    “If you’re looking for a good math teacher, you’re probably looking for somebody who’s exposing their students to more mathematical vocabulary,” said Harvard data scientist Zachary Himmelsbach, lead author of the study, which was published online in November 2025.

    The finding aligns with a growing body of research suggesting that language plays a critical role in math learning. A 2021 meta-analysis of 40 studies found that students with stronger math vocabularies tend to perform better in math, particularly on multi-step, complex problems. Understanding what a “radius” is, for example, can make it more efficient to talk about perimeter and area and understand geometric concepts. Some math curricula explicitly teach vocabulary and include glossaries to reinforce these terms.

    Related: Three reasons why so few eighth graders in the poorest schools take algebra

    But vocabulary alone is unlikely to be a magic ingredient.

    “If a teacher just stood in front of the classroom and recited lists of mathematical vocabulary terms, nobody’s learning anything,” said Himmelsbach. 

    Instead, Himmelsbach suspects that vocabulary is part of a broader constellation of effective teaching practices. Teachers who use more math terms may also be providing clearer explanations, walking students through lots of examples step-by-step, and offering engaging puzzles. These teachers might also have a stronger conceptual understanding of math themselves.

    It’s hard to isolate what exactly is driving the students’ math learning and what role vocabulary, in and of itself, is playing, Himmelsbach said.

    Himmelsbach and his research team analyzed transcripts from more than 1,600 fourth- and fifth-grade math lessons in four school districts recorded for research purposes about 15 years ago. They counted how often teachers used more than 200 common math terms drawn from elementary math curriculum glossaries.

    The average teacher used 140 math-related words per lesson. But there was wide variation. The top quarter of the teachers used at least 28 more math terms per lesson than the quarter of the teachers who spoke the fewest math words. Over the course of a school year, that difference amounted to roughly 4,480 additional math terms, meaning that some students were exposed to far richer mathematical language than others, depending on which teacher they happened to have that year.

    The study linked these differences to student achievement. One hundred teachers were recorded over three years, and in the third year, students were randomly assigned to classrooms. That random assignment allowed the researchers to rule out the possibility that higher performing students were simply being clustered with stronger teachers.

    Related: A theory for learning numbers without counting gains popularity

    The lessons came from districts serving mostly low-income students. About two-thirds of students qualified for free or reduced-price lunch, more than 40 percent were Black, and nearly a quarter were Hispanic — the very populations that tend to struggle the most in math and stand to gain the most from effective instruction.

    Interestingly, student use of math vocabulary did not appear to matter as much as teacher use. Although the researchers also tracked how often students used math terms in class, they found no clear link between teachers who used more vocabulary and students who spoke more math words themselves. Exposure and comprehension, rather than verbal facility, may be enough to support stronger math performance.

    The researchers also looked for clues as to why some teachers used more math vocabulary than others. Years of teaching experience made no difference. Nor did the number of math or math pedagogy courses teachers had taken in college. Teachers with stronger mathematical knowledge did tend to use more math terms, but the relationship was modest.

    Himmelsbach suspects that personal beliefs play an important role. Some teachers, he said, worry that formal math language will confuse students and instead favor more familiar phrasing, such as “put together” instead of addition, or “take away” instead of subtraction. While those colloquial expressions can be helpful, students ultimately need to understand how they correspond to formal mathematical concepts, Himmelsbach said.

    This study is part of a new wave of education research that uses machine learning and natural language processing — computer techniques that analyze large volumes of text — to peer inside the classroom, which has long remained a black box. With enough recorded lessons, researchers hope not only to identify which teaching practices matter most, but also provide teachers with concrete, data-driven feedback.

    Related: A little parent math talk with kids might really add up

    The researchers did not examine whether teachers used math terms correctly, but they noted that future models could be trained to do just that, offering feedback on accuracy and context, not just frequency.

    For now, the takeaway is more modest but still meaningful: Students appear to learn more math when their teachers speak the language of math more often.  

    Contact staff writer Jill Barshay at 212-678-3595, jillbarshay.35 on Signal, or [email protected].

    This story about math vocabulary was produced by The Hechinger Report, a nonprofit, independent news organization focused on inequality and innovation in education. Sign up for Proof Points and other Hechinger newsletters.

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