Teacher Vacancies Aren’t Just a Staffing Problem: Get Ahead of Staffing Gaps

Every teacher vacancy is more than an HR problem; it’s a school-wide disruption. While administrators work to fill open positions, classrooms often run with split coverage or delayed instruction. Research shows that these gaps are tied to real learning loss for students. 

For administrators, this probably isn’t a surprising picture. You’ve seen what happens when a position sits open longer than expected. A substitute is called in, changing day to day. Another teacher absorbs additional students. An administrator shifts their schedule around to cover a class. Plans get adjusted, routines get shuffled, and everyone works a little harder to keep things moving.

The difficult part is that these situations can start to feel normal. When staffing challenges happen year after year, it can be easy to think of them as simply part of operating a school. But the research suggests something important: these disruptions are not isolated incidents, and they are not problems that schools can necessarily wait out. 

Across U.S. public schools, staffing shortages are not rare but rather an ongoing, ever-present issue. National Center for Education Statistics (NCES) data shows that on average, public schools had six teaching vacancies to fill during the 2024-2025 school year. And even when positions are “filled,” many schools rely on emergency certifications or teachers working outside their subject area. 

That means the question isn’t simply whether a district has vacancies, but what happens between the moment a position becomes vacant and the moment a qualified educator is in the classroom? Every day in between has consequences, not only for the students in that classroom, but for the staff members and administrators working to keep the school functioning. 

This trend is not improving. According to the National Council on Teacher Quality, enrollment in teacher preparation programs in 2023 was only about 70% of what it was in 2013. Fewer people entering the pipeline means fewer teachers are available when schools need them. That creates a challenge that is bigger than any one hiring season. If the pipeline of educators is shrinking while schools continue to experience vacancies, districts cannot rely solely on the hope that enough applicants will eventually come along. Schools need ways to respond when vacancies happen—and strategies that help minimize the amount of time students spend without consistent instruction. 

Research backs up what schools experience every day. A study by Papay & Kraft found that students assigned to teachers hired after the school year begins score lower in math and reading. The difference may look small on paper—about 0.03 to 0.04 standard deviations—but it adds up to several days or even weeks of lost learning over a school year. For a school leader, those numbers represent something much more tangible: instructional time that students cannot get back. And while no district can prevent every vacancy, districts can control how quickly and effectively they respond when one occurs.

The impact doesn’t stop in one classroom. Research from the National Bureau of Economic Research shows that when teachers leave or are replaced, it disrupts team planning, school routines, and consistency across grade levels, not just the students in that one room. This is why staffing should be viewed as more than a recruiting challenge. A vacancy can create a ripple effect that reaches teachers, administrators, students, and entire teams. The longer a position remains unresolved, the more opportunities there are for that disruption to compound. 

Taken together, the research tells a clear story: when schools can’t staff classrooms quickly and consistently, students lose instructional time and steady progress. Staffing isn’t just about filling a position; it directly affects how much learning happens over the course of the year. For districts trying to avoid that disruption, the key is getting ahead of vacancies before they turn into lost learning time.

The reality is that staffing challenges aren’t going away on their own. But districts don’t have to face them alone. Having a plan for vacancies before they become prolonged disruptions can make the difference between a successful academic year and one filled with headaches. 

That’s where the right staffing partner can help. SmartStart Education provides K–12 Staffing Solutions designed to help schools address the people and capacity challenges that can stand between a vacancy and consistent support in the classroom. We find qualified staff who meet your standards. With over 20 years of experience providing trustworthy educators, SmartStart can find who you need when you need them.  

All of our educators have a bachelor's degree or higher, at least a year of classroom experience, in-depth subject knowledge, and a passion for education. They all complete a background screening to meet your district's standards. From long-term subs to paraprofessionals, we've got you covered! 

Another benefit to choosing us is the opportunity to hire the staff member we find for you after our contract ends! This means your new favorite long-term substitute can be a permanent employee.   

Contact us to learn how we can help you prepare for vacancies before they arise!