In the race to help students recover from pandemic-related learning loss, education leaders have overlooked one of the most powerful tools already at their disposal: experienced teachers.
For decades, a myth has persisted in education policy circles that after their first few years on the job, teachers stop improving. This belief has undercut efforts to retain seasoned educators, with many policymakers and administrators treating veteran teachers as replaceable cogs rather than irreplaceable assets.
But that myth doesn’t hold up. The evidence tells a different story: Teachers don’t hit a plateau after year five. While their growth may slow, it doesn’t stop. In the right environments — with collaborative colleagues, supportive administrators and stable classroom assignments — teachers can keep getting better well into their second decade in the classroom.
This insight couldn’t come at a more critical time. As schools work to accelerate post-pandemic learning recovery, especially for the most vulnerable students, they need all the instructional expertise they can muster.
That means not just recruiting new teachers but keeping their best educators in the classroom and giving them the support they need to thrive.
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In a new review of 23 longitudinal studies conducted by the Learning Policy Institute and published by the Thomas B. Fordham Institute, all but one of the studies showed that teachers generally improve significantly during their first five years. The research review also found continued, albeit slower, improvement well into years 6 through 15; several of the studies found improvement into later years of teaching, though at a diminished pace.
These gains translate into measurable benefits for students: higher test scores, fewer disciplinary issues, reduced absenteeism and increased postsecondary attainment. In North Carolina, for example, students with highly experienced English teachers learned more and were substantially less likely to skip school and more likely to enjoy reading. These effects were strongest for students who were most at risk of falling behind.
While experience helps all teachers improve, we’re currently failing to build that experience where it’s needed most. Schools serving large populations of low-income Black and Hispanic students are far more likely to be staffed primarily by early career teachers.
And unfortunately, they’re also more likely to see those teachers leave after just a few years. This churn makes it nearly impossible to build a stable, experienced workforce in high-need schools.
It also robs novice teachers of the veteran mentors who could help them get better faster and robs students of the opportunity to learn from seasoned educators who have refined their craft over time.
To fix this, we need to address both sides of the equation: helping teachers improve and keeping them in the classrooms that need them most.
Research points to several conditions that support continued teacher growth. Beginning teachers are more likely to stay and improve if they have had high-quality preparation and mentoring. Teaching is not a solo sport. Educators who work alongside more experienced peers improve faster, especially in the early years.
Teachers also improve more when they’re able to teach the same grade level or subject year after year. Unfortunately, those in under-resourced schools are more likely to be shuffled around, undermining their ability to build expertise.
Perhaps most importantly, schools that have strong leadership and which foster time for collaboration and a culture of professional trust see greater gains in teacher retention over time.
Teachers who feel supported by their administrators, who collaborate with a team that shares their mission and who aren’t constantly switching subjects or grade levels are far more likely to stay in the profession.
Pay matters too, especially in high-need schools where working conditions are toughest. But incentives alone aren’t enough. Short-term bonuses can attract teachers, but they won’t keep them if the work environment drives them away.
Related: One state radically boosted new teacher pay – and upset a lot of teachers
If we’re serious about improving student outcomes, especially in the wake of the pandemic, we have to stop treating teacher retention as an afterthought. That means retooling our policies to reflect what the research now clearly shows: experience matters, and it can be cultivated.
Policymakers should invest in high-quality teacher preparation and mentoring programs, particularly in high-need schools. They should create conditions that promote teacher stability and collaboration, such as protected planning time and consistent teaching assignments.
Principals must be trained not just as managers, but as instructional leaders capable of building strong school cultures. And state and district leaders must consider meaningful financial incentives and other supports to retain experienced teachers in the classrooms that need them most.
With the right support, teachers can keep getting better. In this moment of learning recovery, a key to success is keeping teachers in schools and consciously supporting their growing effectiveness.
Linda Darling-Hammond is founding president and chief knowledge officer at the Learning Policy Institute. Michael J. Petrilli is president of the Thomas B. Fordham Institute, a visiting fellow at the Hoover Institution and an executive editor of Education Next.
Contact the opinion editor at opinion@hechingerreport.org.
This story about teacher retention was produced by The Hechinger Report, a nonprofit, independent news organization focused on inequality and innovation in education. Sign up for Hechinger’s weekly newsletter.
