Classroom distractions are a measurable instructional challenge. In TALIS 2024, about one in five lower-secondary teachers across OECD systems reported significant disruptive noise and disorder. In PISA 2022, 30% of students across OECD countries said they became distracted by digital devices in mathematics lessons. U.S. school data also show that lack of focus, classroom disruption, and unauthorized device use can affect both learning and staff morale.
Table of contents
- How often classroom distractions interrupt lessons
- How much instructional time is lost
- Digital devices, phones, and online distractions
- What U.S. schools report about the effects
- Teacher-reported disruption and rule enforcement
- Teacher capacity to manage disruptive behavior
How often classroom distractions interrupt lessons
The OECD’s TALIS surveys measure classroom climate through teacher reports. In TALIS 2018, 29% of lower-secondary teachers across OECD countries agreed that they lost quite a lot of time because students interrupted the lesson. Another 28% agreed that they had to wait quite a long time for students to quieten down at the start of lessons. A further 26% reported much disruptive noise in their classrooms. These are teacher-reported measures from 2018, not direct observations of every lesson. (The changing landscape of teaching: TALIS 2018 Results, Volume I)
The same TALIS 2018 results also show that distractions do not describe every classroom experience. Seventy-two percent of lower-secondary teachers across OECD countries agreed that students took care to create a pleasant learning atmosphere. The figures therefore capture a mixed classroom environment: many teachers reported positive student cooperation, while substantial minorities also reported interruptions, noise, or time spent waiting for quiet.
TALIS 2024 provides a newer comparison, although its measures and reporting period should not be treated as a perfectly identical trend series. About one in five lower-secondary teachers across OECD systems reported significant disruptive noise and disorder. The country-level range was wide: more than 50% of teachers in Brazil reported this problem, while just over 33% did so in Chile, Finland, Portugal, and South Africa. Fewer than 5% reported significant disruptive noise and disorder in Albania, Japan, and Shanghai (China). (The demands of teaching: Results from TALIS 2024)
Brazil also stood out on time lost to interruptions in TALIS 2024. About 43%–44% of Brazilian teachers reported losing a lot of time waiting for students to quiet down, and about 43%–44% reported losing a lot of time because students interrupted the lesson. The results show why “classroom distraction” can mean more than a single off-task student: repeated interruptions and settling time can become a recurring part of instruction.
How much instructional time is lost
TALIS 2018 teachers across OECD countries reported spending 78% of a typical lesson on actual teaching and learning, 13% keeping order, and 8% on administrative tasks. The categories do not describe a universal schedule for every classroom, but they show how classroom management occupies a meaningful share of lesson time. (The changing landscape of teaching: TALIS 2018 Results, Volume I)
Students in compulsory lower-secondary education spent an average of 913 classroom hours per year in the referenced OECD education-time data. That annual figure gives context to the lesson-time percentages: even a recurring management demand can affect a large number of classroom hours over a school year.
The international differences were substantial in TALIS 2018. Teachers reported spending at least 85% of classroom time on teaching and learning in Estonia, the Russian Federation, Shanghai (China), and Viet Nam. In Brazil, Chile, Saudi Arabia, and South Africa, teachers reported spending only 65%–70% of classroom time on teaching and learning.
| Measure | Result | Period and scope |
|---|---|---|
| Teaching and learning time | 78% of a typical lesson | TALIS 2018, OECD countries |
| Keeping order | 13% of a typical lesson | TALIS 2018, OECD countries |
| Administrative tasks | 8% of a typical lesson | TALIS 2018, OECD countries |
| Keeping order | More than 15% of lesson time | TALIS 2024, OECD systems |
| Keeping order | More than 20% of lesson time | TALIS 2024: Brazil, French Community of Belgium, Saudi Arabia, Türkiye |
| Keeping order | Below 10% of lesson time | TALIS 2024: Albania, Czechia, Estonia, Lithuania |
In TALIS 2024, teachers reported spending more than 15% of lesson time keeping order on average across OECD systems. The share exceeded 20% in Brazil, the French Community of Belgium, Saudi Arabia, and Türkiye, while it was below 10% in Albania, Czechia, Estonia, and Lithuania. The OECD average rose from 13% in TALIS 2018 to 16% in TALIS 2024; because the two surveys are separate measurement periods, this should be read as a reported comparison rather than proof that every classroom experienced the same increase.
Primary classrooms can also have different management demands. In TALIS 2018, primary teachers spent more time keeping order than lower-secondary teachers in 8 countries and economies with comparable data. The largest primary-versus-lower-secondary difference was 6.6 percentage points in Denmark.
Digital devices, phones, and online distractions
Digital devices can support learning while also creating opportunities for off-task activity. In PISA 2022, 30% of students across OECD countries reported becoming distracted by using digital devices in mathematics lessons. Students also reported an average of 2.0 hours per day using digital devices for learning activities at school and 1.1 hours per day using them for leisure at school. (Investments in a solid foundation for learning and well-being: PISA 2022 Results, Volume II)
Phone restrictions did not mean that phones disappeared from school use. Among OECD students in schools where cell-phone use was banned, 29% reported using a smartphone several times a day at school, and an additional 21% reported using one every day or almost every day. Across OECD countries, 45% of students said they felt nervous or anxious when their digital devices were not near them.
PISA 2022 also reported different mathematics outcomes alongside different levels of leisure-device use. Nineteen percent of OECD students reported spending no time on digital devices for leisure at school. Thirty-one percent reported spending up to one hour per day on leisure devices and scored 20 points higher in mathematics than students reporting no time. After accounting for student and school socioeconomic profiles, the difference associated with up to one hour per day was 10 points. These are associations, not evidence that leisure-device use caused the score difference.
More device time was not uniformly associated with better results. The 7.8% of OECD students who spent 5–7 hours per day on digital devices for learning at school scored 12 points lower in mathematics than students spending 3–5 hours. The PISA findings describe relationships in 2022 data and do not establish an ideal amount of device use for every classroom.
Access to clear expectations may also vary by school context. Digital-device guidelines were more common in advantaged schools than disadvantaged schools in 13 countries and economies in PISA 2022, while the reverse pattern occurred in 3 countries and economies.
What U.S. schools report about the effects
The National Center for Education Statistics surveyed U.S. public schools about conditions during the 2023–24 school year. Twenty-six percent reported that student lack of focus or inattention had a severe negative impact on learning, and the same percentage reported a severe negative impact on teacher and staff morale. (About One-Quarter of Public Schools Reported That Lack of Focus or Inattention From Students Had a Severe Negative Impact on Learning in 2023–24)
Classroom disruption itself had a severe negative impact on teacher and staff morale in 22% of U.S. public schools and a severe negative impact on learning in 19%. Students not doing individual work had a severe negative impact on learning in 19% of schools and on morale in 15%. Unauthorized use of cell phones, computers, or other electronic devices had a severe negative impact on both morale and learning in 16% of schools.
Other reported school-climate measures show that distractions can occur alongside broader behavior concerns. Thirty-six percent of U.S. public schools reported student disrespect toward teachers or staff at least weekly in 2023–24, while 17% reported student verbal abuse of teachers or staff at least weekly. Cyberbullying among students occurred at least weekly in 30% of schools and daily in 11%.
The need for support also increased in the NCES results. The share of U.S. public schools reporting a need for more classroom-management-strategy training rose from 50% in May 2022 to 61% in May 2024. These percentages describe school reports for the specified survey points; they do not measure the same thing as the OECD teacher-level classroom-time estimates.
Teacher-reported disruption and rule enforcement
NCES teacher data for the 2020–21 school year provide another view of classroom distractions. Thirty-two percent of U.S. public school teachers agreed that student misbehavior interfered with their teaching. Thirty-seven percent agreed that student tardiness and class cutting interfered with their teaching. (Teachers’ Reports of Disruptive Student Behaviors and Staff Rule Enforcement)
The reported share agreeing that student misbehavior interfered with teaching fell from 41% in 2011–12 to 32% in 2020–21. That change is a comparison between the stated survey years, not a claim that every type of distraction declined.
Rule enforcement was reported more often for principals than for other teachers. In 2020–21, 67% of U.S. public school teachers agreed that other teachers at their school enforced student-behavior rules, while 83% agreed that their principal enforced those rules.
Experience groups also differed modestly. Agreement that student misbehavior interfered with teaching was 36% among teachers with 3 or fewer years of experience and 35% among those with 4–9 years. It was 31% among teachers with 10–19 years and 30% among those with 20 or more years.
Teacher capacity to manage disruptive behavior
TALIS 2018 asked U.S. lower-secondary public-school teachers how capable they felt in specific behavior-management tasks. In the U.S. sample, 84.6% reported being able to control disruptive classroom behavior quite a bit or a lot. (Percentage of lower secondary teachers in public schools who reported being able to manage various aspects of student behavior “quite a bit” or “a lot,” by selected teacher and school characteristics: 2018)
The corresponding figures were higher for setting expectations and following rules: 92.7% reported being able to make expectations about student behavior clear quite a bit or a lot, and 88.0% reported being able to get students to follow classroom rules at those levels. Calming a disruptive or noisy student was reported by 79.8% at quite a bit or a lot.
Age differences were limited in the supplied U.S. results but still measurable. Among lower-secondary public-school teachers under age 30, 81.8% reported being able to control disruptive behavior quite a bit or a lot. The measure reflects teachers’ reported capacity in the 2018 U.S. TALIS sample; it is not a direct success rate for individual incidents.