Table 7.  Number and percentage of public schools reporting disruptions at school from death threats, bomb threats, or chemical, biological, or radiological threats, the number of incidents reported, and the rate of disruptions per 1,000 students, by selected school characteristics: School year 2009–10

 
  Disruptions from death threats, bomb threats, or chemical, biological, or radiological threats
School characteristic  Number of schools   Percent of schools   Number of incidents   Rate per 1,000 students  
All public schools4,300 5.2 5,700 0.1  
                 
Level1                
Primary 1,900 4.0 2,400 0.1 
Middle 900 6.2 1,400 0.1 
High school 1,000 8.0 1,400 0.1 
Combined 400!6.7!500!0.2!
                 
Enrollment size                
Less than 3001,000 5.1 1,200!0.3!
300–4991,000 4.0 1,200 0.1!
500–9991,400 4.7 1,900 0.1 
1,000 or more900 10.0 1,400 0.1 
                 
Urbanicity                
City 1,200 5.7 1,600 0.1!
Suburb 1,400 5.9 2,000 0.1 
Town 800 6.8 1,000 0.2 
Rural 800 3.3 1,100 0.1!
                 
Crime level where students live2                
High 500 7.7 700 0.2 
Moderate 1,400 7.4 1,800 0.2 
Low 1,700 3.6 2,200 0.1 
Mixed800 7.1 900 0.1!
                 
Percent of combined Black/African American, Hispanic/Latino, Asian, Native Hawaiian/Other Pacific Islander, and American Indian/ Alaska Native students               
Less than 5 percent500!4.1!600!0.1!
5 to less than 20 percent1,000 4.6 1,200 0.1!
20 to less than 50 percent1,000 5.1 1,500 0.1 
50 percent or more1,800 5.9 2,400 0.1 
                 
Percent of students eligible for free or reduced-price lunch                
0–20 percent500 4.0 700 0.1 
21–50 percent1,200 4.6 1,700 0.1 
More than 50 percent2,500 5.9 3,400 0.2 
                 
Percent of students below 15th percentile on standardized tests                
0–5 percent1,400 4.2 1,700 0.1 
6–15 percent1,600 5.2 2,000 0.1 
More than 15 percent1,300 6.8 2,000 0.2 
                 
Percent of students likely to attend college                
0–35 percent1,200 6.5 1,500 0.2 
36–60 percent1,200 4.9 1,600 0.1!
More than 60 percent1,900 4.7 2,600 0.1 
                 
Percent of students who consider academic achievement important                
0–25 percent300!6.2!400!0.2!
26–50 percent500 4.4 800 0.1!
51–75 percent800 3.5 1,100 0.1 
More than 75 percent2,600 6.2 3,400 0.1 
                 
Percent male enrollment                
0–44 percent400!5.4!600!0.1!
45–55 percent3,300 5.0 4,600 0.1 
More than 55 percent500!5.9!500!0.1!
                 
Student-to-FTE ratio3                
Less than 12 students700!5.5 800 0.2 
12–16 students1,400 4.4 1,900 0.1 
More than 16 students2,200 5.7 2,900 0.1 
                 
Number of classroom changes 4                
0–3 changes600!3.3!900!0.1!
4–6 changes2,100 5.5 2,700 0.1 
More than 6 changes1,600 6.0 2,100 0.1 
                 
Regular use of law enforcement 5                
Regular use2,000 5.8 2,900 0.1 
No regular use2,200 4.7 2,800 0.1 
                 
Number of serious discipline problems6                
No problems3,000 4.9 3,700 0.1 
1 problem700 4.8 1,000 0.1 
2 problems300!7.6 500!0.2!
3 or more problems300!6.9 500 0.1!
                 
Transfers as a percentage of enrollment7                
Less than 6 percent900 4.5 1,000 0.1 
6 to less than 11 percent800 4.4 1,400 0.1!
11 to less than 21 percent1,100 5.0 1,400 0.1 
21 percent or more1,400 6.6 1,900 0.2 
                 
Percent of students absent on a daily basis                 
0–2 percent300!   
3–5 percent2,100 4.4 2,600 0.1 
6–10 percent1,500 5.9 2,200 0.1!
More than 10 percent400!9.5!600!0.2!
                 
Prevalence of violent incidents8                 
No violent incidents500!2.3!600!0.1!
Any violent incidents3,800 6.2 5,000 0.1 
!Interpret data with caution. The standard error for this estimate is from 30 percent to 50 percent of the estimate’s value.
‡Reporting standards not met. The standard error represents more than 50 percent of the estimate.
1Primary schools are defined as schools in which the lowest grade is not higher than grade 3 and the highest grade is not higher than grade 8. Middle schools are defined as schools in which the lowest grade is not lower than grade 4 and the highest grade is not higher than grade 9. High schools are defined as schools in which the lowest grade is not lower than grade 9 and the highest grade is not higher than grade 12. Combined schools include all other combinations of grades, including K–12 schools.
2Respondents were asked, "How would you describe the crime level in the area(s) in which your students live?" Response options included "high level of crime," "moderate level of crime," "low level of crime," and "students come from areas with very different levels of crime."
3Student-to-FTE ratio was calculated by dividing the total number of students enrolled in the school by the total number of full-time-equivalent teachers and aides. The total number of full-time-equivalent teachers and aides is a combination of the full-time and part-time teachers and aides, including special education teachers and aides, with an adjustment to compensate for the part-time status.
4Respondents were asked, "How many classroom changes do most students make in a typical day?" Responses exclude morning arrival and afternoon departure.
5Respondents were asked, "During the 2009–10 school year, did you have any security guards, security personnel, or sworn law enforcement officers present at your school at least once a week?"
6Serious discipline problems include student racial/ethnic tensions, student bullying, student sexual harassment of other students, student verbal abuse of teachers, widespread disorder in classrooms, student acts of disrespect for teachers other than verbal abuse, gang activities, and cult or extremist group activities. If a respondent reported that any of these problems occurred daily or weekly in their school, each was counted once in the total number of serious discipline problems.
7Transfers as a percentage of enrollment combines the number of students who were transferred to a school and the number of students who were transferred from a school divided by the total number of students enrolled in the school.
8Violent incidents include rape or attempted rape, sexual battery other than rape, physical attack or fight with or without a weapon, threat of physical attack with or without a weapon, and robbery with or without a weapon.
NOTE: "At school" was defined for respondents to include activities happening in school buildings, on school grounds, on school buses, and at places that hold school-sponsored events or activities. Detail may not sum to totals because of rounding. Responses were provided by the principal or the person most knowledgeable about crime and safety issues at the school.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics (NCES), 2009–10 School Survey on Crime and Safety (SSOCS).