IES Blog

Institute of Education Sciences

Changes in Pupil/Teacher Ratios in 2020: Impacts of the COVID-19 Pandemic

The COVID-19 pandemic has brought enormous challenges to the education system, including a historic decline in enrollment in fall 2020—the largest since during World War II. Due to the relatively small decrease in the number of teachers, there was a significant drop in the pupil/teacher ratio.  

The National Center for Education Statistics (NCES) releases key statistics, including school staffing data, compiled from state administrative records through the Common Core of Data (CCD). In 2019, about 48 percent of public school staff were teachers (3.2 million) and 13 percent were instructional aides (0.9 million). NCES’s new School Pulse Panel survey found that in January 2022, about 61 percent of public schools with at least one vacancy reported that the pandemic increased the number of teacher and staff vacancies, and 57 percent of schools with at least one vacancy found that the pandemic forced them to use teachers outside their normal duty areas.

Pupil/teacher ratios provide a measure of the quantity of instructional resources available to students by comparing the number of students with the total full-time equivalent (FTE) of all teachers, including special education teachers. The public and private elementary and secondary average class size is larger than the pupil/teacher ratio since it normally does not factor into team teaching, specialty teachers, or special education classes. Between fall 2019 and fall 2020, enrollment in public elementary and secondary schools1 decreased by 2.7 percent.2 This decrease was larger than the 0.2 percent (6,700)3 decrease in the number of public school teachers. Since fall 2020, public school enrollment decreased by a larger amount than did the number of teachers. Thus, the pupil/teacher ratio declined in school year 2020–21 by a relatively large 0.5 pupils per teacher, from 15.9 to 15.4 pupils per teacher (figure 1). This is the largest 1-year decrease in more than 4 decades. In comparison, the pupil/teacher ratio for private schools was 11.4 in 2019–20 (the latest year of actual data available). It is worth noting that pupil/teacher ratios vary across schools with different characteristics (table 208.10).

Viewed over a longer term, the pupil/teacher ratio in public schools in 2019–20 (15.9) was only slightly lower than in 2010–11 (16.0), so nearly all the change during the 2010–11 to 2020–21 period occurred in the last year. The pupil/teacher ratio for private schools decreased from 12.5 in 2010–11 to 11.4 in 2019–20.


Figure 1. Pupil/teacher ratio in public and private elementary and secondary schools: 2010–11 to 2020–21

Line graph showing pupil/teacher ratio in public and private elementary and secondary schools from 2010–11 to 2020–21

NOTE: Data in this figure represent the 50 states and the District of Columbia. Data for teachers are expressed in full-time equivalents (FTE). Counts of private school enrollment include prekindergarten through grade 12 in schools offering kindergarten or higher grades. Counts of private school teachers exclude teachers who teach only prekindergarten students. Counts of public school teachers and enrollment include prekindergarten through grade 12. The pupil/teacher ratio includes teachers for students with disabilities and other special teachers, while these teachers are generally excluded from class size calculations. Ratios for public schools reflect totals reported by states and differ from totals reported for schools or school districts.  The school year 2020–21 pupil/teacher ratio shown in this figure includes only states which reported both membership and FTE teacher counts for SY 2020–21.

SOURCE: U.S. Department of Education, National Center for Education Statistics, Digest of Education Statistics 2021, table 208.20; Common Core of Data, table 2.


The declines in pupil/teacher ratios in public schools were not consistent across states between 2019–20 and 2020–21 (figure 2). The relatively large enrollment decreases in many states—along with the smaller decreases or even increases in the number of teachers in fall 2020—led to decreases in the pupil/teacher ratios for most states. Three states (Nevada, Florida, and Ohio) reported increases in their pupil/teacher ratios, and the rest of the states reporting data had decreases in their pupil/teacher ratios. The states with the largest decreases in their pupil/teacher ratios were Indiana (-1.3 pupils per teacher), Arizona (-1.1 pupils per teacher), Kansas (-0.9 pupils per teacher), and Kentucky (-0.9 pupils per teacher).4


Figure 2. Change in pupil/teacher ratios in public elementary and secondary schools, by state: 2019–20 to 2020–21

Map of United States showing increases and decreases in pupil/teacher ratios in public elementary and secondary schools from 2019–20 to 2020–21

NOTE: Data for Illinois and Utah are not available.

SOURCE: U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD), “State Nonfiscal Public Elementary/Secondary Education Survey,” 2019–20 v.1a, table 2, and 2020–21 v.1a, table 2.

 

By Tom Snyder, AIR


[1] Counts of public school teachers and enrollment include prekindergarten through grade 12.

[2] Enrollment data are for fall of the school year while pupil/teacher ratios are based on school years.

[3] Includes imputed teacher FTE data for Illinois and Utah.

[4] Although Oregon had a 2 pupil per teacher decrease based on the Summary Table 2 for 2019–20 and 2020–21, Oregon did not submit prekindergarten data for 2020–21, so the ratios were not comparable.

Powering Our Future: How Service-Learning Aligned with Next Generation Science Standards Can Promote Science Learning, Social and Emotional Skills, and Civic Engagement

Each generation faces its own societal challenges. Two prominent issues—the climate crisis and America’s political divide—are heavy burdens for today’s youth. Without explicit focus in schools, it is hard to imagine how children will learn to work across differences and collaborate with others to solve complex environmental problems. Youth are very capable people, and school comes alive when they feel agency and see how their efforts matter in the community. Service-learning can help teachers make instruction feel relevant and teach skills that lead to civic engagement as youth learn to design, implement, and evaluate solutions to problems that are important to them. In this interview blog, the Connect Science project team explains how they developed curriculum and professional development to support teachers to engage their students in service-learning experiences.

Can you tell us about Connect Science and what it looks like in action?

Fueled by an IES Development and Innovation grant, our team developed and evaluated a science-based service-learning approach for the upper-elementary school years. In doing so, we answered a need that teachers and schools face as they strive to create engaging experiences aligned with the Next Generation Science Standards (NGSS).

Connect Science is a 12-week project-based learning unit for upper elementary students. Early on, teachers and students explore topics of energy and natural resources using lessons aligned with the NGSS. Teachers guide student learning on what it means to be an engaged citizen and on the social and collaborative skills needed to take action in the community. To prepare, teachers receive five days of professional development and follow-up coaching. Teachers also receive a Connect Science manual, related books, and science materials.

But what does Connect Science actually look like in action? Imagine fourth graders engaged in a science unit on renewable and non-renewable resources. The students learn about different energy sources and then discuss pros and cons of each source. They become aware that non-renewable energy resources are rapidly diminishing and would not always be available to generate electricity. The awareness of this problem energizes them to promote energy conservation. Toward that goal, the students decide to educate other students and families at their school about energy use. At the next open house night, they turn their cafeteria into an energy fair where they share important information. For example, one group of students teaches about what types of energy sources were used in their state to produce electricity and another group teaches ways that people can save energy in their home. Before and after the energy fair, the students administer a pre- and post-survey on energy facts to size up what their visitors learned.

How did the IES grant support the development and pilot testing of Connect Science?

In the first two years of this grant, we developed and tested materials with teachers. In the third year, we conducted a randomized controlled trial of Connect Science involving 41 classrooms with 20 in Connect Science and 21 in a waitlist comparison group, resulting in a student sample of 868 students (423 students participated in the intervention).

We found that Connect Science impacted teacher practices and student outcomes. Teachers in the Connect Science group were more effective at engaging in the two NGSS practices that we measured: eliciting and building on prior knowledge and creating opportunities for student critique, explanation, and argument. Further, we saw higher science achievement and energy attitudes and behaviors in the intervention than control condition. The social skill results hinged on the fidelity of implementation. When teachers used more Connect Science practices, students showed improved communication and social competence. As a result of these findings, Connect Science is designated as a Promising Program by the Collaborative for Academic, Social, and Emotional Learning (CASEL).

What are the implications of your findings?

Too few projects integrate academic and social learning in schools. Often, high-quality NGSS materials are developed with little thought about the social skills students need to engage in that instruction. Likewise, social and emotional learning is often taught separately from academic content. Service-learning is a framework that bridges these two areas and allows students to engage in authentic, science-based work. Given our experiences, we have a few recommendations for educators eager to use service-learning.

  • Teach social, emotional, and collaborative skills with intention before launching into group work. In the elementary schools, children thrive from being in supportive caring classrooms and they respond well to lessons on active listening, respectful communication, and understanding people with multiple perspectives.
  • Leverage the existing curriculum and build in service-learning experiences. Rather than adding one more new topic, look at existing curricular topics and use service-learning to facilitate deep learning on content areas that already part of the curriculum.
  • Amplify youth voice. Teachers need to work with students to identify a relevant community problem and generate solutions to that problem. We carefully developed the Connect Science materials to be more teacher-directed toward the beginning of the unit and more student-directed toward the end. This approach was based both on theoretical and empirical work supporting the importance of student autonomy.

 


Sara Rimm-Kaufman is the Commonwealth Professor of Education at the University of Virginia School of Education and Human Development. Her recent book for teachers, SEL from the Start, is based on the Connect Science work.

Eileen Merritt is a Research Scientist in the College of Natural Resources and the Environment at Virginia Tech. Her research and teaching focus on environmental and sustainability education.

Tracy Harkins is the owner of Harkins Consulting, LLC in Maine. Her focus is providing professional development and resources to engage and motivate student learners through service-learning. She will be offering an upcoming Connect Science Institute in Summer 2022.

For questions about this project, please contact Corinne.Alfeld@ed.gov, NCER program officer.